Most Helpful Guy
I don't believe you can force yourself to forgive anyone. The people that claim you can are wrong. Most of them have no idea what you have been through. Real forgiveness has to be earned. If she isn't trying to earn your forgiveness there is nothing you can do to make yourself forgive her. The best you can do is come to terms with what happened and try to find some peace for yourself.
Most Helpful Girl
You can always move out. Or just talk to her, but if that's not an option then you should just get a job and save up so you can move out. It won't last forever and it'll most likely get better