Quote: According to him the only reason they ever fight is because of me. They've never had a real fight about anything else. It's OK. He NEEDS to be happy . . . and she gives him that.
He will never be happy with her. You said a mouthful when you said they only fight about you. I hate to tell your H this but he has you in his life forever because of the kids. Little "Miss High & Mighty" better get used to hearing your name. Maybe she won't hear it from him but she will hear it from your girls when they are with her and their daddy. There will always be a bond between you and your H no matter what happens.
I think you have gotten yourself prepared for anything because you seem so calm. Don't let any of what he says upset you. Take it in stride. He is trying to get a reaction. He wouldn't have stayed there with you if he didn't want to be with you. Whether he had a car or not, if he wanted out, he would have left. He is playing mind games with you. I bet he does the same with her.
You are doing great right now so continue on down this path.