How emotional. It would shake any person that has such good feelings as you have. It amazes me that you have such close R with your H's X and son.
I see your change in emotions to be more detachment. We are in this situation for about the same time and I can feel in myself that I am letting it go a little more.
I don't know if it is good or bad, but I stopped blaming myself as much and start seeing the damage that is being done by my irresponsible H.
It's sad that we need to hear such harsh words from a child, but this is what this man is doing. He is hurting a lot of people.
Hope you had a good time at the book store. You deserve to feel good. So work on yourself. Try to find out the reasons for that shame you talked about.
Remember that you will be OK. Try to picture a year or two from now. It will be a whole different game.