You can take responsibility only for what you may have done/not done to let your marriage get to a certain point, it takes 2, but you can't be responsible for him and the choice he has made to seek OP.
The changes you have made in the last 6 weeks, keep making them, but don't point them out. Let him see for himself, he sounds just like my H. Don't push me, you won't like what you hear, etc... Just keep working on you and focusing on you and the kids. He may not be ready to take them to his place, but if hes there take advantage of that and make plans. Go out and GAL! Do things that make you happy and feel good. If you can be around him and successfully DB, do so, if not, when he is there, go elsewhere until you can. I know how hard it is and I frequently fall off of the wagon, but keep it up because no matter what, you will end up better in the end.
M:39 H:39 K:S14;D8 T:22yr M:15yrs S:12/28/07 EA/PA 3/14/08 OW preg 11/17/08 born 12/12/08 his ~~~~~~~ Never allow someone to be your priority while allowing yourself to be their option