another boy problem...help?

So heres whats up... kind of a long story so bear with me please :]

So I was seeing this guy for a period of like 3 weeks, and we were really good friends beforehand, we would tell each other everything and talk every day etc. So then he kissed me when we hungout one time, and he would say things like "the last thing I want to do is hurt you", "i love you with all my heart", and "I get this amazing feeling when I hold you" you know, cute stuff :P

So this lasted around 3 weeks, then suddenly he doesnt talk to me as much. Then when he does he tells me he's going back to his ex girlfriend, whom he told me was crazy. But they were like a married couple and had a relationship for around a year, but they were always on and off. But he told me that my friendship means a lot to him and he doesnt want to lose it. So at first I thought it was alright and as long as we're friends it would be okay. But after that he would hardly talk to me. I asked him why he hardly talked to me and he said he didnt mean to ignore him he's "just been a mess and doesnt mean to and misses talking to me". Then his crazy now current gf hacks his facebook, messages me calling me an ugly whore. I thought he would defend me and yell at her or something, but he hardly did anything. He didnt even apologize for it, all he said was "just ignore it". Then he woul continue to hardly talk to me, and he's all lovey dovey with his girlfriend. I told him that he really broke my heart and hurt me, and he said he felt terrible about it and he was so sorry etc. Then she goes on his facebook again and takes me off his facebook. This has happened before, but he added me back really quick. But now he ignored my friend request. I could understand him not talking to me because he wouldnt want to make his girlfriend mad, because I was a lot of the reason why they fought before. But I don't understand why he can't just tell me that he doesnt want to make her mad so I'm not offended. He knows I wouldn't get mad, but I'm getting increasingly more angry every day at him for treating me like this. He said he loved me but then just drops me like that for her. I don't know if I'm just being paranoid or not. Should I just move on and get over him or not? I feel like he's never going to get over her. They get back together, they love each other, they fight, they break up. And the cycle goes on. Am I wasting my time or should I wait it out? I don't feel like getting my heart broken again.

Thanks everyone :]