How am i suppose to act towards this man? (males please)?

we've been on and off with our friendship, i keep up with my stubbornness from time to time because he doesnt show me that he cares or tries hard enough to prove to me that he likes me. He told me he liked me a lot, but i dont believe him because i heard a lot of things about him. i keep wanting to know the answer if its true or not. everytime we are friends again he hugs me, and gives me a kiss on the lip and tells me he is happy when he spends time with me. i dont know what he wants. but than the next day he just acts like it never happened.. he's a player isn't he ?.. he's a fraternity boy and i hate to judge . but are things just as simple as they are ?.. please give me legit answer? i dont know how to act. i feel like i throw myself at him when we start to talk again. i dont know why he "likes " me out of all girls because im not the hottest girl on earth. but what does he want from me?.. mess with my head ? im too curious and he's not letting me know what i want to know.. it triggers me even more to find out the answer.. please tell me what im suppose to do? i need to wake up..