What Truegritter said. Being friendly does not mean friendship. Friends don't cause the pain your H caused. I am glad you know that you will be alright no matter what. That's big. If your WAH ever brings up the idea of friendship, then let him know (if that's how you still feel) that you want a friendly co-parenting R, but friendship with someone who has caused you and your S pain and the loss of a stable family is out of the question. And rather unrealistic for him to hope for it.
Again, focus on yourself. Perhaps you don't have a lot to change, but there are things that you can do to get past this situation in your life. And, I think you have started doing them. If he is in MLC, no amount of changing will get him back. He has to get through the MLC himself and then one hopes he will return to the M and family. You will have to detach, protect yourself (and S4) emotionally and financially, and wait it out, if you are inclined to do so.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim
Being friendly does not mean friendship. Friends don't cause the pain your H caused. I am glad you know that you will be alright no matter what. That's big. If your WAH ever brings up the idea of friendship, then let him know (if that's how you still feel) that you want a friendly co-parenting R, but friendship with someone who has caused you and your S pain and the loss of a stable family is out of the question. And rather unrealistic for him to hope for it.