We were together 16 months and we fought a lot towards the end, but I caused a lot of the fights. I know I can change, but last week he broke up with me, saying he wasn't happy anymore. This was the result of an ugly drunk fight where I accused him of cheating on me. He won't talk to me now, but I need to show him that I am willing to do anything to get him back. What's the best way to go about it?