Sorry things are getting to you at the moment. Its understandable.
Some people are just able to move on and that seems great for them (Someone i know, his W left at christmas for OM, that's now over but he has a new GF and he and his W still go to the pub together all the time - I have no clue how they do that). For others there is too much loss for it to be so easy but that shows how much love was and still is there.
you seem like someone who is full of love for your family, for your H and for life in general and that is a really, really good thing even if it feels properly rubbish right now.
Your H is in a hole, and he may still be sinking deeper into it. At the moment he is not trying to climb out which means anyone who tries to pull him out is as likely to get pulled in. instead you've either got to walk away or build a good life next to (but not at the edge of) the hole. when/if he eventually climbs out he will either see you have gone or see the life you've built but either way things will be good for Pink and her boys.
Go Dance, you'll have fun and almost nothing does more to lift mood than fun.
have a good evening
Both mid 30s, 2 young kids BD 7sep14 XW moved on long ago, now living with OM1 D paperwork in progress