He has no right to force you to do anything. I don't know what your relationship is to this guy, but he sounds like a control freak and not someone who has your best interests at heart. Once you are on your road to recovery, I think I'd be making some changes in my living arrangements.
If you have decided to hang in there until a detox bed is available, then I hope you will at least contact your doctor or a doctor and get their advice and help. You don't have to suffer through this alone.