Most Helpful Girl
Build a dog house. Let her screw whoever she wants out there.
Many people are in your boat financially, they want to leave their husbands/wives but they can't afford it.
Separate your finances, and start your OWN SEPARATE bank account. Start dividing up, what belongs to whom, and who gets what. Draw up a contract and get her to sign it in regards to possessions.
SET BOUNDARIES IN THE HOUSEHOLD about curfews, guests, est whatever rules you two have to make so that you don't end up killing each other.
Good luck to you.