I don't know who to talk to

I'm almost 16 and I've never had a boyfriend. I would like to keep it that way because I don't want to be destracted during school. I'm finding it really hard to do that. I mean, no one likes me but when I see an attractive guy, even in class, I get really uncomfortable. I want to tell someone, but I don't know who to tell.  It sounds weird when I admit it, but I think I'm lonely. I don't know what to do when I start to feel weird! Help!