I grew up with an abusive father,i hated it. He only hit my mother, out of all the relationships he had only my mother!! He is not that way now but it took, 13 years before he changed. If you met him you wouldn't know but before you would. It was scary, and when my mom finally left for the first time, we moved to different state, like six away. What I have learned is that no matter what you say to them they feel you deserve what they are giving you. I wouldn't stay, things are bound to get worse before they get better. He has to want to change. And he doesn't know what he really has until its gone. My mom left a few times and came back. When we came back it was okay for about 6 months and then it started again. Things didn't change in his life until he realized my mother wasn't coming back until he changed which was four years before I seen him again. My mom and dad are back together, going on 7years now and he don't hit her anymore, he is usually very sweet. I only got to see two years of my new father, before I moved away.
He told me once that he was glad mom moved us away because he said he probably would have killed her over his jealousy. And that he really didn't know why he acted the way he did, he just thought it was okay when he knows now that he was very wrong. I love the man he is today, and the man he was is dead. I hope this can help.