Hi -
I find what helps me most when I think of my AH fondly is to stop immediately and replace the nice thoughts with all the reasons that I left. He can be sooo sweet - stop - I ended up losing my house. He really is a nice guy when he isn't drinking - stop - when he is drinking he has become a monster. I'm kind of lonely - stop - wow, it is so peaceful because I no longer have to listen to the whining and crying and angry outbursts. See how it works? Keep reminding yourself of why you are not with him. It works for me, sure hope it helps you too.
Take care,
Jo