beingmiranda, I could have written your post word for word!
It's the same way with my daughter. The memories I am creating with her are far better than the memories of when we were a family of three. My ex would sulk and pout whenever he had to spend time with us, especially when his whore was in the picture.
Although the pain of the rejection still stings at times, I know my life is far better without him in it and I love the time I have with my daughter. He can have the memories of walking out on his family and the chaos he created just to be with a stupid, ugly, crazy slut.