I can't stop thinking about Dex. I

know that we won't end up togethei, that he will marry Darcy in September. But I am content to live in the moment, and allow myself the daily pleasure of obsessing. Nothing lasts forever, I tell myself. Especially the good stuff. Although typically you aren't faced with a hard deadline. I think of a few other examples of concrete, predetermined endings. Take college, for example. I knew that I would go away for four years, accumulate friends and memories and knowledge, and that it would all come to an abrupt end on a set date. I knew that on this day, I would collect my diploma and pile my belongings into a U-Haul bound for Indiana, and the Duke experience would be done. A chapter closed forever. But that awareness didn't stop me from enjoying myself, sucking all of the joy out of the deal.

So that is what I am doing with Dex. I am not going to dwell on the end at the expense of the here and now.

Tonight I am home when Dex phones from work to say a quick hello and tell me that he misses me. It is the sort of call a boyfriend makes to his girlfriend. Nothing covert or complicated about it. I pretend that we are together for real. The phone rings again a second after we hang up.

"Hey," I say, in the same hushed tone, thinking that it is only a follow-up call from Dex.

"What's that voice?" Darcy asks, yanking me back to reality.

"What voice?" I ask. "I'm just tired. What's going on?"

She launches into the details of her latest work crisis, which typically amounts to no more than a paper jam at the copier. This one is no exception. A typo on a flyer for a club opening. I resist the urge to tell her that the target audience won't notice a misspelling, and instead ask her who is going to the Hamptons this weekend. I feel my senses heighten, anticipating Dexter's name. He already told me that he was going, convincing me that I had to go too. It will be awkward, but worth it, he said. He has to see me.

"Not sure. Claire might be having friends in town. Dex is in."

"Oh, really? He doesn't have to work?" I ask, sounding a bit too surprised. I feel a stab of worry, but Darcy doesn't notice my false tone.

"No, he just finished with some big deal," she says.

"Which deal?"

"I don't know. Some deal."

Dexter's job bores Darcy. I have observed the way she can shut him down, interrupting him in the middle of a story, transitioning back to her own petty concerns. Am I fat? Does this look good on me? Will you come there with me? Do that for me. Reassure me. Me. Me. Me.

As if on cue, she tells me that she is considering sending in a tape to

Big Brother, that it would be fun to be on the show. Fun for an exhibi-tionist. I can think of few things more horrifying than being on national television, out there for the world to judge, assess, tear apart.

"Do you think I'd get picked?" she asks.

"You'd have a good chance."

She is pretty enough to get picked, and she has a vivid personality—exactly what they look for on reality television. I study my own face in the mirror, think of Dex telling me that I look like a J.Crew model. Maybe I am attractive. But I am nowhere near as pretty as Darcy, with her precise features, incredible cheekbones, bow-shaped lips.

Now she is laughing loudly into the phone, telling me another story about her day. She hurts my ears. The word "strident" comes to mind, and as I study my reflection again, I decide that although I'm far from beautiful, perhaps I have a softness that she lacks.

It is Thursday, the day before we leave for the Hamptons. Dex is over. We had planned on waiting until next week to see each other alone, but we both finished work early. And well, here we are, together again. We have already made love once. Now I am resting my head on his chest. As he breathes, his chest lifts my face slightly. Neither of us speaks for a long time, then he asks suddenly, "What are we doing?"

There it is. The Question.

I have thought of it a hundred times, worded the inquiry exactly like that, with the same intonation, the same emphasis on the word "doing." But every time I answer it differently:

We are following our hearts.

We are taking a chance.

We are crazy.

We are self-destructive.

We are lustful.

We are confused.

We are rebelling.

He is afraid of marriage.

I am afraid of being alone.

We are falling in love.

We are already in love.

And the most common: we have no idea.

This is the one I offer up. "I don't know."

"Neither do I," he says softly. "Should we talk about it?"

"Do you want to?"

"Not really," he says.

I am relieved that he doesn't. Because I don't. I am too afraid of what we might decide. Either choice is scary. "Let's not, then. Not now."

"Then when?" he asks.

For some reason, I say, "After July Fourth."

It sounds arbitrary, but it has always been a benchmark of sorts, the summer midpoint. Even though more than half the summer is left after the Fourth of July, the part that follows is the faster half, the part that always flies by. June, although a day shorter, feels so much longer than August.

"Okay," he says.

"No examining anything until July Fourth." I state the rule clearly, as I would at the outset of a law-school exam. My voice is firm, even though I'm not sure what we've just decided. That we are finished as of July Fourth? Or maybe… no, he couldn't think that I meant that is when he would tell Darcy he can't go through with marrying her. No, that is not what we just decided. We simply decided to decide nothing. That is all.

Still, picking the date scares me. I picture a giant countdown of days, hours, minutes, seconds. Like the clocks set up in 1999 for the countdown to the new millennium. I remember watching the seconds roll off such a clock in the post office near Grand Central Station sometime in December. That clock made me nervous, frantic. I wanted to attack my to-do list, clear my desk of backed-up calls, finish it all immediately. At the same time, watching those numbers tick by paralyzed me. I had too much to do, so why do anything at all?

I try to calculate the number of hours left before July Fourth. How many nights we will have together. How many times we will make love.

My stomach growls. Or maybe it's his. I can't tell because I am flat against him. "Are you hungry? We can order food," I say, and kiss his chest. "Or I can make us something."

I imagine myself whipping up a tasty snack. I can't cook, but I would learn. I would make an excellent, nurturing wife.

He tells me that he doesn't want to waste time eating. He can get something on his way home. Or just go to bed hungry. He says he wants to feel me against him until it's time to leave.

The next day I ask Dex if there were any problems when he returned home. It is a vague question, but he knows what I am asking. He says that Darcy was not home when he got in, so he had time to shower, reluctantly wash me off him. He says that Darcy had left him a message: "It's eleven and you're not answering your cell or your phone at work. You're probably having an affair. I'm going out with Claire."

It is her usual tongue-in-cheek accusation when Dex works late. She asks him if he's having an affair, never believing that he would do such a thing. She changes the person every time, selecting a random female name from his office. The less attractive the woman, the more amused she is. "I know you're in love with Nina," she'll say, knowing that Nina is a chubby word processor from Staten Island with fake nails adorned with glitter art.

I think of Dex returning home last night. A whole scene unfurls in my mind—Dex stealing into his apartment, hurrying to shower and get in bed, waiting for the key to turn in the lock, pretending to be asleep when Darcy enters their room. She hovers over him, studying him in the dark.

"How was your date with Nina?" she asks in a wry, loud voice.

He wipes his eyes with his fists as people do on television when they're awakened from a sound sleep. "Hi," he says wearily and then pretends to fall back asleep.

She cuddles up to him in bed, tossing out an "I love you."

His jaw clenches, but he says it back. What choice does he have? He falls asleep thinking about me. Thinking that her chin is too sharp against his chest.

I am watching them on the beach, down by the water.

Darcy and Dex standing together in the not-too-hot June sun. This weekend is the first that I have seen them together since Dex and I soberly, willfully, made love. I am wearing dark sunglasses so I can study them from my towel without being obvious, while Claire babbles to me about—what else?—the wedding. What if the night is chilly? Should we buy matching wraps, a light, gauzy cardigan? I nod and murmur that it is a good idea.

Dex has just finished a quick swim, even though the water is freezing. Now they are talking, huddled close together. Perhaps he is giving her the report on the water temperature. She hesitantly steps closer to the ocean's reach, just enough to let the water coat her feet. They are both smiling. Dex kicks water onto her shins and she shrieks, turns, and scampers a few feet from him. I can see the muscles strain in her long, tanned legs. She is wearing the nude-colored bikini. Her hair is down, blowing around her face. He laughs, and she raises her index finger as if to scold him and then walks toward him again. They are engaged in a full-fledged frolic. It pains me to watch them, but I can't stop. I can't look away.

I feel as if they are putting on a show. Well, Darcy is always putting on a show. But Dex is a willing participant. Surely he knows we are all watching. That I am watching. It is always that way when you are in a group and someone decides to go for a swim or walk to the water. The ocean is like a giant stage. It is natural that the others watch, if only for a moment. Dex must be aware of this, yet he is still in full-throttle playful-couple mode. He should be brooding on his towel, napping, or reading a novel—something dark, to give me the impression that he is confused, upset, torn. But instead he is splashing Darcy and grinning.

Marcus cups his mouth with his hands, yells down at them. "How cold is it?"

"Freaking freezing!" Darcy announces, her hand stroking Dex's back, while he reports a manly "Nah, it feels good. Come on down!"

Rage commingles with hurt. For the first time, I completely regret having sex with Dex. I feel foolish, suddenly sure that it meant next to nothing to him. Tears sting my eyes as I force myself to turn away from them, slip on my headphones. I order myself not to cry.

Before I can hit play, Marcus asks me what I'm listening to. I have only seen him once since our date and that was just for a quick weekday lunch at a deli near my office, but we have talked several times, and one conversation lasted over an hour. The only apparent reason why date number two has not happened, at least as far as he knows, is mere circumstance. He's busy, I'm busy. Work has been crazy. That whole routine. So the door is still wide open, which I am very glad about. I need to focus more on him. Feelings for him might emerge once I put Dex behind me. I smile and say, "Tracy Chapman. It's a good CD. Wanna listen?"

I hand him my headphones as Dex and Darcy walk toward us. Marcus listens for a few seconds. "That's nice." He gives my headphones back to me and fishes a Coke out of our cooler. "Want a sip?" he asks just as Darcy and Dex are standing over us.

I tell him sure, take the can, and wipe the lid with the edge of my towel after I swallow.

He says with a knowing, goofy look, "I don't mind your germs. If you catch my drift."

I laugh and shake my head, as if to say, Marcus, you crazy nut, you.

Marcus winks. I laugh again.

Perfect timing. Dex catches the whole exchange. I do not look at him. I will not. "Is anybody else getting in?" he asks.

Claire gives him the standard response. "Not yet. I'm not hot enough."

Marcus says he hates to swim, particularly in freezing water. "Please make me see how that is fun."

Darcy giggles. "It's not fun. It's torture!"

I say nothing, hit the play button on my Discman.

"What about you, Rachel?" Dex asks, still hovering over me.

I ignore him, pretending that the volume is too high to hear him.

He and Darcy return to their towels on the other side of Claire. Darcy brushes sand from her feet and ankles, while Dex sits cross-legged, looking at the ocean. I can see his shoulder and back out of the corner of my eye. I try not to think about his smooth skin and how he feels against me. I won't be feeling it again. I tell myself it's not the end of the world. It is for the best.

Before dinner that night, as I am dressing, Darcy comes to my room to ask me if I brought an eyelash curler. I tell her no, that I don't own an eyelash curler. Maybe Hillary does, but she is showering. She sits on my bed and sighs, her features rearranging in a dreamy expression.

"I just had the best sex," she says.

I struggle to keep my composure. "Oh, really?" I know I am opening the door for more sharing, but I don't know what else to say. My face is on fire. I hope Darcy won't notice.

"Yeah, it was phenomenal. Did you hear us?" It is like Darcy to share such details. She has always been explicit in her sexual reports. She will tell you what words were exchanged at the moment of orgasm. I have always listened, usually laughed, occasionally even enjoyed her stories. But those days are long over.

"No. I must have been in the shower," I say.

"Yeah, we were in the shower too." She finger-combs her wet hair, then shakes her head from side to side. "Wow. Haven't had sex like that in months."

I think of their wet bodies pressed together and can't decide who I hate more.

It is late, after two a.m. I have avoided Dex all night, at the house and then at dinner. Now we are at the Talkhouse. I have just ordered two beers, one for me and one for Hillary, when Dex finds me at the bar.

"Hi, Rach," he says.

I am buzzed and brazen. The alcohol has dried up my hurt, leaving only resentment and anger. They are easier emotions to manage, more straightforward. "Yes?"

"What's going on?" he asks casually.

"Nothing," I snap, turning to leave.

"Wait a sec. Where are you going?"

"To take Hillary her beer."

"I want to talk to you."

"What about?" I make my voice icy.

"What's wrong?"

"Nothing's wrong," I say, wishing I could think of something pointed and vengeful. I have not had much practice being mean, but my tone of voice must do the trick because Dex looks hurt. Not as hurt as I was today on the beach or during Darcy's sex report. Not hurt enough. I raise my eyebrows, looking at him with a slight look of disgust, as if to say, Yes? Is there something I can do for you?

"Are you—are you mad at me?" he asks.

I laugh—no, it is more of a snort.

"'Are you?" he asks again.

"No, Dex, I'm not mad at you," I say. "I really am not concerned with you at all. Or what you do with Darcy."

Now he knows that I know. "Rachel…" he starts, flustered. Then he tries to tell me it was her doing, that she initiated it.

"She said it was the best sex of her life," I say as I walk away, leaving him standing alone at the bar. "Good job. Congrats."

Even in the fog of my buzz, I know that I have no right to confront Dex like this. All he did was have sex with his fiancée. He has promised me nothing—we were not supposed to even discuss anything until the Fourth of July. No material misrepresentation has been made. In fact, no misrepresentation has been made at all, material or otherwise. I am in this situation of my own accord, have not been duped. But I still hate him.

I scan the crowd, trying to find Hillary. Dex follows me and grabs my arm right below my elbow. I drop one of the beers. The bottle breaks.

"Nice. Look what you did," I say, looking down at the mess.

"I'll get you another one."

"Don't bother."

"Rachel, please… I couldn't help that. It was Darcy, I swear."

Hillary suddenly appears beside us. "What's up?"

I am not sure if she heard any of our conversation.

"Nothing," Dex answers quickly. "Rachel's just mad at me for dropping her beer."

"You can have mine," Hillary says.

"No, take this one," I say, handing her the other beer.

She reluctantly takes it and asks where Darcy is.

"We were just looking for her," I say.

I glance at Dex. He is trying to cover up in front of Hillary, but he is not doing the best job of it. His eyes are wide with worry, his mouth stretched into an uneasy smile. I bet he didn't have that look on his face in the shower.

It is over, I say in my head, with the dramatic flourish of a woman wronged. Then I turn around to find Marcus. Sweet Marcus, who offered me his Coke on the beach and is not engaged to anyone.