It's a cocktail party to help everyone in the Good Place get to know each other, and he does not want to get to know any of these people. 

He's wearing the same faded green t shirt and ripped jeans he wore everywhere in life; he sticks out like — well, like a homeless twenty-four-year-old at a cocktail party. He avoids the wine more out of habit than out of any particular preference; he doesn't, as a rule, trust drinks he didn't pour himself. (Maybe someday, now that he's here, he'll unlearn habits like that. It's a nice thought. He doesn't entertain it for long.) 

He has no preferences around food and also no shame, which might be the saving grace of the night; he can take as many of these whatever-they-ares as he wants and while someone might side-eye him nobody is going to stop him. 

Correction: there's one guy Sasha might want to get to know. 

He's also wearing ripped blue jeans. His T-shirt says "Ainsworth & Bem & Clark & Gibson & Linehan." He has a tattoo on one arm and three piercings on his other ear, and half his head is shaved.

He might also be interesting because he's saying "Sasha? Sasha? Is anyone here named Sasha?"

…huh. 

Sasha watches him for a few minutes before approaching. "Hi?" 

"Are you Sasha? I'm looking for Sasha."

"Yes, I'm Sasha. Is there a reason you're looking for me?" 

He glances Sasha up and down, in a gay sort of way, and then smiles enormously. 

"Can we talk privately for a sec?"

Well, this definitely won't be worse than anything else he could be doing. 

He looks the guy up and down, in a gay sort of way, and says "Course." before following him. 

When they're alone, the guy says, "I've been trying and trying to think of a way to say this that doesn't sound creepy and ridiculous, and I failed, and I think if the information is good I can say it the creepy and ridiculous way. Uh. A robot lady showed up and handed me a note that had my secret time travel password on it and the note said that I love you."

He skips over robot lady and secret time travel password to focus on the objectively more important part of this statement.

Everyone else here has been calling him Alexander. If the note says Sasha that's evidence right there. 

"Did it say anything about me?" 

"The note said my time travel password, and then it said that 'you love Sasha', and then it said 'You could say, I have been foolish. You could say, I have been fooled. You could say, Some years, there are apples.' which I don't know what that means at all--"

"— yeah, alright, I'll buy time travel shenanigans before I'll buy that you randomly guessed my favorite lines of my favorite poem. What's your name?" 

"Lev. --You are a really stupidly attractive person, gosh, future me has incredibly good taste. I'd probably think that, wouldn't I, because I'm me? Oh, crap, I'm babbling, sorry, I get like this around hot guys--"

"Lev." He says it the way he'd say cellar door, like the sound is beautiful even independent from what it means. "Don't be sorry. You're cute." 

"Oh god you think I'm cute. I mean, you would probably think I'm cute, because apparently I'm in love with you in the future, but it's still really nice to hear from somebody, like, I don't know, maybe I totally messed it up this time around-- sorry, the only way to get me to shut up is to kiss me, uh, not that I'm suggesting you kiss me, I mean I'd really like it because did I mention you are really stupidly attractive but I don't want to like make you feel like you have to kiss me if you don't want to--"

He can definitely see how he would be in love with Lev. 

He steps forward and kisses him before he can continue, warm and open-mouthed and inviting. 

Sasha is immediately teleported a foot away.

"What the fork. --Why the fork can't I say fork."

"— what purpose could that possibly serve?" 

"Fork, shirt, corkbucker, motherforker, peace, count, tights. --What the fork."

"Son of a rat —" he tries. "— okay, so we can still swear we just have to be creative about it. Who thought this was a good idea?" 

"Well, we don't technically know if you're bleeped or not yet. Maybe they're just mad about my bloody pottymouth."

"Fork, shirt, yeah it's not just you." 

"That's weird." He walks up to Sasha, tucks a lock of his hair behind his ear, kisses him, and is immediately teleported a foot away. "Okay, so it happens every time."

"It happens every time we kiss on the mouth, anyway." He tries to walk up to Lev and hug him. 

Hugs are allowed!

"Oh, you're soft. You smell nice," Lev says, and makes a happy little noise into his hair. "Do you mind if I go kiss my soulmate? I want to check whether this is an us thing or an everyone thing, and I didn't kiss my soulmate before because I had the note and I didn't know what you would feel about it."

"I don't mind you kissing your soulmate," he says. He's not looking forward to what'll happen when his soulmate expects him to kiss her, but he'll cross that bridge tonight. Or burn it. Whichever.