You can't! Neither can he. I know that my kids mention things that their Mom says that they, the walk away spouse, remembers. I didn't think she said anything but I am not living with her. So...they MUST be thinking about us. There are not all terrible thoughts about us that they keep.
My mind was racing also in the beginning. I have learned to slow it down though...I know...you want results and you want them now. Guess what?? YOU WON'T GET THEM!!! I still love my XW but she already knows that. It is her that FEELS that she doesn't love me anymore...see what I'm getting at?
As the book says and everyone here....time is on our side....believe it or not.