ex bf problum please help me???

my ex used to call me alot and told me he liked me than he stoped and and he found a note that said i love someone witch the note was a joke to make him jealous but after he found the note he started a rommer saying he liked me for my body and that he really dident like me, and he talks about me on the bus when im there setting lessoning, but he does look at me in gym when im there setting and talking, and looks when i get up and get of the bus, and i think he called sunday but i hung up as soon as he said hey he called like 5 times. i hung up, than now his talking about me again,and stuff witch i talk about him also, saying i hate him his ugly can't stand him. but i dont know what do do so tell me what should i do now? and does he like me or not? whats he trying to do, cause his pissing me of