Ok, Girls And Guys i need your opinion!!!?

Well, there is this guy at school that I really like. I have liked him since school ended last year! We are in the same grade! I need to know wheter or not he likes me. He sits next to me in homeroom, I catch him looking at me at lunch!! He talks to me most of the time!! And is always making jokes that are Perverted ( Most Of The Time) so that I can ALWAYS hear them?? His best friend whose a girl but they ARE NOT going out says that he doesn't like me, but I am not so sure!! What do u think??