Please help...

So I recently just started college. Going in to college, I was in a relationship. On October it would of been 3 years together. We are going to different colleges and I had a feeling things weren't going to work out. So I had told him after our high school ended we should break up that way we won't end up hurting each other in college(I'm very insecure and as sad as it sounds, after almost 3 years of being together I don't trust him). He insisted we stay together. He said he really loved me and he really wanted to try it out. As soon as college started, he all of a sudden changed his mind he wanted to break up. Yeah I was upset because I feel like he got my hopes up..but I went with it. However we still talked here and there, he still called me "babe" and tell me "I love you" which made it feel like we were still together..fast forward to yesterday, we got in a HUGE fight which ended up physical on my behalf..(I was really upset and extremely hurt that he would still talk to me like that but at the same time he was already talking to other girls like nothing) I feel horrible for doing what I did. I know this isn't a healthy relationship..I guess all I want to know is how can I forget about him? How can I forget about the one who I loved. My very first serious boyfriend..how can I make the pain go away?