I'm sorry you're in such a tough spot. It's hard to give advice in this sort of situation not knowing the whole story. Are you truly done with him and just want a divorce? If that's the case then the best advice I can think of would be to talk to an attorney. If you would rather he cleaned up and got a job then I'd ask have you tried to get him to get help? Have you told him that you're fed up and ready to leave unless he gets clean etc? What is he addicted to?