I can definitely understand. I think it was worse while my W was in the house. I knew where she was going.. she lied all the time. It was crazy.
You definitely need to focus on what you want. I've hit the same crossroad. Is this really the woman I want to be with?
Well.. .the woman that is there now... No. Am I open to possibly finding that woman again? Yes.
Problem she will have is I may not be "available" when she wants to come back.
Move forward... that is the only thing you can control. Doesn't mean you don't love her or don't want what's right for the family. Quite the opposite actually.