I had to cut ties with my mother a few years back. I didn't talk to her, didn't visit her... nothing. My situation is a bit different from yours. My mother is an alcoholic, and she completely ruined my childhood because of it. (And tried to ruin my adult life)

Sometimes severing ties is all you can do to protect yourself. And, you might not have to sever ties forever. Sometimes people learn from their mistakes and try to be better. I do talk to my mother now... she has stopped drinking, though, and she realizes how awful life was for me then because of her. I don't see her much, but I do speak with her.

Whatever you decide to do, I hope things get better. You don't deserve that type of treatment from anyone... not even a parent. Emotional abuse can be just as bad, if not worse, than physical abuse.