I need some advice...

How do you emotionally detach from someone you love? This man has emotionally, mentally and physically abused me in the past. He made no effort in the relationship and a lot of the time I felt worthless and unloved. Then HE broke up with ME! I think the reason I can't let go is because I was manipulated for so long into thinking this was normal and it would get better. But now I'm left craving his love and attention and I don't want to! I want to be healed and fine and normal again. I want to be able to move on, I just can't detach myself from him.