I Can Not Stand Child Abuse

I have a really bad relationship with my dad. I'm not going to go into a lot of detail but he will often shout horrible things to me and my mum and he will lash out at us as well (pushing and hittjng) it's hard because I wish I could get along with him as he is a family member but at the same time I don't want to be near him and I have just seen him as a bad person recently. He had a heart attack around Christmas time which was awful to witness and obviously I'm always going to be connected to him in some way even though I constantly feel like I hate him I don't want anything bad to happen to him. However he now constantly uses his heart attack against us as if he blames us for it in the first place. Whenever he gets angry he will shout that we are going to give him another hearattack ( his heart attack was actually due to over eating and lack of activity) . I sometimes wish I could leave but my mum told me that we can't afford a house of our own based on what she earns. I didn't think this post would be so long but it feels better to let out what's been on my mind recently. ( the last time I said one word to him was Monday and we live under the same roof )