Wow, Heather...

Good for you! I know this is a lot to deal with and it is even more difficult around the holidays, but I think this is great news. NY is right, though, that a lot of hard work is ahead and changes and results need to be monitored.
I can hear your excitement and hope in your post and I think that is wonderful news. I def. think you guys each need IC and MC. This may be hard for H to fit into his schedule, however if he wants to keep his family intact, it needs to be a priority.
So far this is words, not action, but these words and the conversation you had may be a first step. I congratulate you for deciding to place some boundaries in your life...and I am happy that H is recognizing and at least verbally agreeing to step up to the plate. Wonderful news, Heather. I know difficulties lie ahead and I think you should use caution in getting too excited, but it seems this maybe could be a turning point and I truly hope it is!!!
You guys have to learn completely new interactions and that will take time and much work. If you are both truly willing to do it, the possibilities are there.