Iveslovespink has a good point. I'm sorry you had to learn your lesson the hard way: Stealing bfs does not pay.
The guy's a jerk, by the way. You should be snagging someone single and unattached. Things you should be doing now:
- Take back/withdraw what you deposited in your joint bank account.
- Change your sim.
- Stop renting the place that you mentioned.
- Cut ALL communication lines from the guy.