How do you get over a breakup?

My boyfriend and I have been together for a little over a year. We completely dedicated all of our time to eachother. We spent every minute outside of work together. However, we argued constantly. He was very jealous of an ex and always accused me of liking him still etc. He also would ask questions about my past relationships and people whom I've had with, how he compared to them, all the stuff that you really don't need to know in a relationship. We have been fighting constantly basically from three months on and have been trying to make it work but it won't. He says hurtful things. Unbeleivable things that someone who hated you might not even say. He also cheated on me in the beggining, saying it was because of all the guys who I was friends with.Well, yesterday we got into yet another fight and ended it. I have his clothes and stuff all bagged up and waiting for him to pick up today...I just don't know how I'm going to get over it. (cont.)