C - Very early on in my sitch I had to make the decision to not have my EW attend my birthday party. It occurred about 1 month after she moved out. It was a hard decision to make but it was the right one.
Remember you do not want to be with someone who does not want to be with you. Chasing someone like that makes you look desperate and weak. Also remember that the desire to save yourself has to be greater than your desire to save your MR.
There are thousands of ladies that would love to be with Cory09 so don't give this 1 fish in the sea the power to determine your path forward and value.