I want to ask -- why present tense?
Punctuation/grammatical hiccups. Many spots need a comma and have none; other spots don't need a capitalized letter and have one; there are spelling mistakes. A quick proofread should fix it.
First chapter -- as the others said, the descriptions are extremely sparse. There's so much dialogue, and almost no narrative, such that it seems like a skit more than prose. The characters' dialogue have issues, too -- they don't talk like real people. Mark doesn't talk to Corey like a friend. He talks like a self-help textbook on love-life. Or Aunt Agony. As a result, he doesn't seem to be anything more than a talking cardboard cut-out who's just there to nag Corey into finding a girl. Corey, similarly, is bland.
Second chapter -- still no characterization that I can see. The chapter seems devoted mostly to letting several characters describe Corey's virtues (as opposed to, you know, let the character show it in actions himself), something that I wince at quite a bit. Hopefully, this won't turn into a brooding Gary Stu.
Third chapter --
Corey, Mark, and Jessica are walking across the St. Lawrence University campus after lunch heading for the student parking lot.
Details, details, details. This sentence is an example of why underdone descriptions are bad. It's bland, it's boring, and it's about as fun to read as a sheet of physics formulae.
Corey turns his head to look at Jessica and says, "You're Thai, aren't you?"
Show, not tell. Never tell. Ever. How does Corey tell Jessica is Thai? Slanted eyes? Facial structure? Height?
On a similar count, none of the characters gets described, either. What's up with that?
The dialogue is beginning to grate on me. It reads like a ping-pong game at stalemate: it drags on and on and gets nowhere. Certainly, in real life, small talks don't go anywhere, but in fiction, you're supposed to hold the reader's attention, not bore her to sleep. Maybe I'm not a fan of teen humor/young adult books, at that, so I find some of the supposed-to-be-funny bits less than clever.
Still no characterization, and we're over 2,000 words in. The characters each seems to have all the emotional depth of a very tiny puddle. I'm not asking you to dramatize every little thing into five pages' worth of angst, but this is terribly bare-boned.
I'm stopping here, because if I continue, this post will get much too long. Bottom line: do try to set scenes. The story, thus far, has exactly zero atmosphere. It's not badly written in the sense of mangled grammar and murdered English language, it just doesn't tickle my interest. It doesn't intrigue my senses (sound, sense, smell, taste, sight); the plot doesn't seem to have manifested yet; the characters are lifeless.
