I may be way off base here, but I'm guessing that you're not an American citizen and you feel that you're stuck with him due to residency/greencard requirements. I can't remember the exact time required, but I know that CIS (formerly INS) will give greencards to foreign spouses of American citizens, but requires that you stay married for some specified timespan. If that's the case, find yourself an immigration lawyer. I'm sure there's some way around the time requirement in cases of abuse.
If I'm wrong, sorry - just ignore this. But if I'm right, there are things you can do besides staying in an abusive M and watching the calendar.
