He's unsure of himself and afraid of rejection, and needs to feel at ease in order to be honest. If you like him, a come-on might make him panic, just be open and friendly and hang around... since it's high school, all you really have to do is talk about him to a couple of girls and he'll get the word that you like him and maybe dig up the courage to make his move lol. :P
if he is a he...he is that type of person. and he is lying...HE LIKES YOU!
he wants something that at your age, i dont recommend giving
if he says he doesn't like you then he doesn't like you