I like this boy but am I just too weird?

I set next to this guy in maths and he always talks to me and flirts with me, I think? That's the problem, I'm not sure. I sometimes catch him looking at me and even my friends have seen it... but I'm an annoying weird geeky... geek. And he's perfect and cute and fit. I'm just terrified I'll embarrass myself by judging his signals wrong. He always works with me even if we could just work alone and its not like I'm the only one he can talk to because his best mate is just across from me. What do I do? Do I step back? Make a move? argh I get so paranoid!