Help!!!!!!!!! guys probs!!!!!!!?

there is a really cute boy in my cl who every girl in the cl likes. it always seems like it likes me, but he acts that way to the other girls too. hes always takin my stuff and throwin it in the trash can. but he does that to the other girls. how do i know if he likes me? how do i get him to notice me. i dont even think that he knows that any of us like him!!!!!!