How can you get on well with a father like that?

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I feel not happy these days ,because my dad a man I hate very much.I even dont like eat with him ,or stay in a house together .If not for my mom.I would leave that house. The man has bad manner ,Since I was very young ,I remenber that he always abuse my mom. And hit her often when he is unhappy .They quralled a lot and fight a lot , The other day,He abused my mom again ,And I was there too, I shout at him that he was wrong ,But he didn't listen to me ,and abuse me too.We shout at each other ,He felt very angry and can't stop abusing me .He even want to hit me .My mom protect me . These days ,I felt very unhappy as long as I saw him. I even don't want to have a meal as long as he is the ,I can't forgive him in my heart . How can I do ?,please help me. Thank you