terrible parents?

How do y'all deal with terrible parents? I'm 21 but I'm in college full time so I can't really afford a place on my own right now. Anyways, when I try to talk to my mom about anything she gets mad and looks away and avoids me like she's 7 or she will mock me like a child. And then my dad is abusive at times and also verbally abusive. I feel terrible for cutting them off because I love them but they won't take my feelings into consideration one bit.