How to get over a guy who broke my heart?

Okay, so I had this crush on a guy for a few months and then he said he likes me too. We started dating for a few weeks but then I realized that I was always the one to start a conversation and he didn't really seem to say anything else other than the simple "I love you". He was hanging out with many other girls but I didn't do anything about it because I just didn't want to seem like I was jealous. His friends never liked me and we haven't really "hung out" together except for short and "sweet" conversations in private. Then one day he fell for another girl. He keeps denying it when I asked him but I wouldn't believe him. Whenever I ask him he would just say, "No I love you." But he doesn't even try to make it sound believable so we just eventually stopped talking. I keep telling myself that he isn't worth it and I've tricked myself several times into believing that I was over him but I keep falling for him again. I tried deleting him from my friend's list on Facebook and deleting his messages but I only found myself looking going onto someone else's account (with their permission) and looking at his profile. I get jealous whenever he is with another girl and he wasn't even willing to give me a simple hug as a good-bye when school ended. I think I'm over him just a bit but maybe this is just my mind playing tricks on me again. Please help? I really want to stop obsessing over him soon.