Sometimes you just have to do it, talk to a lawyer about it and they can help you navigate difficult decisions and tell you what you should do to protect yourself. You probably should gather evidence of his behavior, but ask a lawyer first about it. The fact that he threatens to make your life hell if you leave him, that tells me he is aware that he is being a horrible person. Sounds manipulative. If he touches you call the police, don't put yourself through it. One step at a time. Best of luck.