All this change is since surgery? is it drugs or meds coupled with emotional and physical pain? Is W back to work or total recovering at home? maybe this isn't about you at all, just how different she feels from what was 'normal'. I sense your frustration, but are you supporting her during this physical stress time? Things seemed to be going in such a good direction before her surgery.
Live your life while you are still living. Riding the trail less traveled.