Is it possible for you to write her a letter including everything that you feel towards her? Since you don't believe confronting her is possible, you wouldn't even need to be near her when she reads it. I'm in a similar situation here with my mom (its been this way forever) until I move in the coming weeks. I wouldn't want you to assault her because of your future. Plus, if you had to go to prison, we'd miss you on here too much.