This guy in my Biology cl.?

There's this guy named Kris, he's a freshman, and I'm a sopre, he's in my Biology cl, and he's immature (but that's how all freshman are) but he's cute. We used to sit by each other. When we did, he would talk to me and ask me questions. And they were real gross/perverted. And I just sit there and lmao. But he has a gf since August, and he really loves her. Whenever I was walking in front of him in the hallway, he would be like "God, can't you go any faster, geesh!" it was funny. But now, we don't sit by each other, and never talk. I added him on MySpace, he added back :) and he asked me in front of the whole cl if I added him on MySpace? So embarring... And when I walked to lunch talked to one of my guy friends, he would stare at me, I don't know if he was jealous? But it's weird. And I still don't talk to him, but I think he's cute, :)