It is pathetic, really. I really don't want to hear about it.
The very fact that he wants to talk to you about it over and over is telling. It says to me (an outsider) that he doesn't care about your feelings. He doesn't care how his words are impacting you. He is in his own tunnels. There have been times when I've spoken to friends friends about my H and I realise it is unfair of me to burden them with my grief. And it is just plain selfish. He wants the focus to be on him.
Originally Posted by May
I also really don't want to live in the same house with him still actively talking to her.
You are already living in a house where he is actively talking to her. Right now, he has to hide in the corners and do it. Once he moves to the basement, he will be free to talk to her as much as he wants WITH YOUR PERMISSION. He wants to do this knowing you are upstairs in your bedroom probably in tears.
This is the kind of man you are married to at the moment.
You two have never had any clear boundaries (I know, pot, kettle black). I think you need to decide what your boundaries are.