If you are both adults, you can call the police. So let him know when you are calm and not arguing that next time he strikes you, you will call the police. He does not get to hit you. I know this seems impossible, but it isn't. When I was 17, one of my teachers found out about the abuse at home, and told me I could live with her and she would let me finish high school in the same school district and make sure that I got to college. The time time my mother went to hit me, I told both my parents that they could not hit me anymore. I had somewhere to go, and I WOULD leave and take my little sister with me. The hitting stopped instantly and neither of them ever hit me again.