Does he like me? what should i do?

ok theres a guy in my geometry cl...hes a sophmore ima freshman...and he's always joking around with me and i think trying to flirt too. anyway...theres this inside joke with my cl that we were all going to call in sick so we could close the school and we'd all use heroin after school to make us look sick or w/e (no one actually getting high...its just a joke) then yesturday on facebook i decided to try and talk to him so i started joking around about the whole heroin thing...should i talk to him tonight or is that being a bit pushy or obvious? oh ya i like him too...anyway i was thinking that the next time we play the cell phone game in cl (take out our phones n put them on the table to seee whos gets taken away first..ya ik its kinda stupid but we do it alot...) that i would take his phone and just put my number in it as jamie is the best or something dorky like that cuz thats what other ppl do all the time...how do u think he would see that as? and do you think he likes me? (the way he jokes around is by makeing really stupid but funny comments..and like today he sharpened his pencil then poked me with it and was like "isn't that sharp" and was kicking my chair and when im like "really" he just laughed..andyway thats the kind of stuff he does...so any advice?