Of course he's gonna say that if a hot girl comes up to a guy he's more than likely not gonna say he likes you, at first anyways! Then the stalker takes over! Soon its emails, love letters, flowers then phone calls!
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