Why do you feel like you have to validate EVERYTHING she says? Don't. You've apologized enough. You don't even have to apologize. Just tell her that you understand that she might feel that way, and that you have changed and if she's not willing to see it, well it's her problem. Then walk away.
Start standing up for yourself and stop letting her take control. You're letting the fear get to you where you agree to everything she says. No woman respects a guy like that.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.