help

Well hello everybody. Basically I have a very unusual situation. I am a guy and recently I have found myself attracted to another guy in my year. The thing is, I'm not gay though. Maybe I'm bi, but I don't really know. I'm confused on that front now though, as this is the first time I've been attracted to a guy. I was never attracted to guys before, but since falling for him perhaps I'm a little more open to that. But anyways...as I said I have really fallen for this guy, and I have a big crush I suppose you'd say. It started out as noticing that he was good looking and then somehow it developed into actually liking him. He isn't gay either, and I know he's had many girlfriends but sometimes I really think he likes me too. I've noticed him looking at me sometimes, and there are times when it seems he tries to sit near to me. Like in one class I sit beside his table, but someone sits between us (does that make sense? lol). But when the person between us is out he'll sit in that place so in effect beside me. When he does it he won't really talk to me though. He might ask about something I have with me or maybe some notes he missed, but never a full blown conversation. Maybe it's just wishful thinking but sometimes it just seems that he wants to get near to me. Another good example was last week when we had assembly. There are always different rows to stand in, and he usually doesn't stand in the same as mine. But this week he seemed to be standing as close as possible to me. While we were waiting for our teacher he was standing really close to me the whole time, and he's never done that before. Do you think it's all in my head? Sometimes I'll notice him look over at me if we have the same class, and I'll do the same. Or when we're in the corridor we'll make eye contact. But then sometimes I get absolutely nothing...he talks about girls alot and he seems to have a new girlfriend every 2nd week. So I am really confused. I really don't know how I'd ask him about the whole thing. What if he doesn't? I'd never be able to face him again if I told him and he didn't feel the same. Then everyone would think I'm gay or bi or whatever, and I don't want that. But if he likes me he probably feels exactly the same. I guess we both have alot to lose. I don't know why I'm posting this here though...I suppose there's not much help or advice you can give other than "Just ask him". The thing is it's just really not that easy...I don't know what to do! Do you think it's possible for him to actually like me if he doesn't appear to be gay??