I'm going to take that everything in your post is accurate. If that is the case then pack your personal stuff and leave. Cancel all credit cards that are in both your names and open a personal checking account in your name only. Personally I would take exactly half of what is in the joint account and put it in the personal account. You can always agrue it later in court. If the woman is acting like that you can guarentee that if the police show up she will lie and guess who will be going to jail.
Excuse me Officer, I have a stupid Question. "No problem, I've got a stupid answer for you!"