Let me put it to you this way, you underestimate how she is going to feel with you out of the house. With you out there is no 300 pound gorilla in the room. The weight of the world will be off her shoulders and she will begin to come alive again. This will reinforce what within her?

If you move out you give her all the power in the world to fast track a divorce. You don't want that. If you stay in the house she will have to be the one to break the union. She does not want to do that yet. You buy yourself some time staying in the house. You better get to changing and fast. Your words do not hold any weight as she has probably heard it all from you before. I'm sure you know what needs to be done.