Does he like me (or is he being a pervert)?

Ok, so there is this guy his name is Jordan. He ALWAYS makes me laugh. He sits behind me in my science cl, and for almost the whole period he will be doing something like poking me with his pencil or pushing his textbook into my back (not hard!!) and he seems like he does like me a little bit. I'm not sure. But sometimes I just look at him and it SEEMS like he is trying to tell me something. My friends say that he really does like me, but I think he is being a pervert, because my friend Sarah says she thinks he likes me because he has liked almost every girl in our homeroom cl at least once. I want to take the chance so bad, but I know he will turn me down, especially when he is around his guy-friends. Please tell me what you think. Does he like me?