I completely agree with B on cutting the financial ties at this point. Still pay the bills....but definitely time for an Eric only checking account. From that just transfer the exact amount to cover bills into the joint account and pay them immediately.
Bills have to be paid.....but no more easy access to your money. She has her own account....let her use her money for playtime.
Stop worrying about the leaving thing. It will happen one way or the other. So it is out of your control unless you make the decision yourself....which right now is staying.
I highly recommend a run today....if it is raining it will be even better....Helps you cool off.