It just really seems she has her heart set on D and can't pull trigger. So no matter what I do even with all positive changes she is just waiting for me to screw up and/or snap.

I really don't know what I can do to change dynamic.
Honest to god I feel she goes is going to counseling just to gain strength to leave me. She has told me this

All I know is it can't go on like this forever. The kids are noticing.
It is beyond frustrating that there is no effort .

I feel she wants me to confront her so she can have excuse to bail .