I believe a couple has to have a period of time after the time the D is final before trying to become friends. You would need to move forward without her. Otherwise, it would be too stressful to look at her as a friend only.
It is funny how the WAW in an A always want to be friends with the man they left. I would suggest you just focus on co-parenting, and see how about friendship later.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
