Wouldn't it be appropriate to say something like: "Well, I'm sorry it didn't work out." "I hope you find the happiness you're looking for."
For closure of the M I said those exact words to my XW the last time she left "our" house. Then she started talking about us still being there for each other due to the kids bla bla bla, then I just turned around and walked back inside...
Btrow,
Are you saying that you turned around and walked back into your house as your XW was talking about being there for each other due to the kids?
Married 9, Together 13, Divorce in Progress M: 44, W: 44, S: 7 Bomb Dropped (EA, D): 7/19/17
