Mighty, I remember reading something a while back that says that "not making a decision is a decision".
What you are feeling is very normal and you are going to have days where nothing helps. Those are the days that you have to take it step by step, grieve, cry, shout, beat the stuffing out of something, etc. Feel those emotions and then let them go. You've got some DIY things to work on and today is a good day to take that hammer out and use it.
As for your xh, he's confused and yes, he's still got feelings for you...but are they right kind of feelings, i.e., a man should have for his wife and not just a friend? Quite frankly, he doesn't know which end is up and you can't listen to his bs right now. He's sitting on the fence and is hopefully keeping his options open by dropping those tidbits of saying he's got feelings for you.
Yes, it is very sad that this grown man can't get it together, but that's not your problem to fix. Yes, it's sad for your children because they need a mature, responsible and accountable father who is there for them 24/7. Mlcers can't stand to be alone because they have to have someone there to use as a crutch and to help them focus on what they are doing at the moment. If they don't have that crutch, then they would have to find something else to take their focus off what needs fixing. It's a sad situation and no one should ever want to be walking in their shoes.
It's not easy turning a deaf ear and a blind eye to what he's doing, especially when he's living next door...but you've got to find a way to help yourself off that mlc train or you will be right down in the dark pit w/him, living in a very confused state all of the time.
I think what's going w/you is that you are heading towards acceptance of the situation and you are having a difficult time of it because you know that once you've accepted the situation for what it is today, your heart will break completely in two.
Please be kind to yourself today. Okay?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.