Its tricky, i suggest you get legal advice, get all you finances together and all debts and so on, and check what you can and cant do and what you are entitled to.
They are delusional honestly, mine isnt any mire sane than yours, less nasty in fact very amicable at the moment.
I have been waiting on the legal front to see if he tries to deposit his paychecks to a different account. Or til he actually files. I really don't want to spend the money on legal help if/til it gets to that point.