Man, I feel for you. You don't deserve to be treated this way. I don't think I can offer any advice to you that you don't already realize yourself.
If it were me, I would do whatever it takes to get out of that house. It will be very hard for you to get better when you're in contact with her, let alone living with her.
In the meanwhile, post here often, and educate yourself as much as possible on your options for getting out of the house and other legal entanglements ASAP. Take care amigo.