I know exactly how you feel. My W and I are living together, sleeping in the same bed, talking, doing family stuff every weekend, etc. Yet she keeps saying that she wants a D and how she just doesn't love me anymore...blah blah blah.
So for me, detachment meant going to the gym to make me feel better about myself. It meant doing things and not wondering if my W was going to be offended about it. It meant coming with the understanding that if I went home today and saw everything gone, I'd be fine. That it would be her loss, not mine.
Sandi gave me a great piece of advice. Just to do something for myself every day. Even if it was just to walk and get lost for a bit. That has helped to keep me focused. I also pray for her alot and for her disquiet.
Something that will hopefully give her peace.
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.