Also - remember that if your house is in a crazy-market area, you and he will make a very good profit if you do sell, which you would split 50/50- and enable you to start your new life in a not-broke status. Legal advice is a good idea when assets hang in the balance, and therapy/counseling is a good idea when hearts hang in the balance.
I wish you well!!
As someone in late 40s, I giggle a little though. To me, you're still very very very young, with many many fruitful and productive years ahead. You'll be great. Do stuff for yourself - this can be an opportunity to re-invent yourself, explore what YOU want, without someone else's feelings/wants/needs to consider.