Tuffgirl and Suki said it all. My experience is things became a lot clearer in my head when I moved out. I've only been out 2 weeks but I feel so much better. As others have said when you are in the middle of it you can't see the forest for the trees.
Funny thing is when I moved out I fought with her every bit as much (in my head!). Things are starting to settle down now, I'm working on going no contact and I am getting back in touch with me.
Be strong and do what is right for you. Make the choice that is going to help your recovery and be selfish about it. It's your choice to make.
(((hugs)))