Rowena - Okay, this is getting ugly but your H is acting like an *ss. I'd suggest getting a lawyer IMMEDIATELY to advise you, but if you just want his dumb butt out, then wait til he leaves when you know he will be gone for a while, call a locksmith (who you should have notified already to be waiting for your call), and have them change the locks. Put his stuff outside. Then call the cops when he comes back. Don't wait til it gets ugly, call them as soon as he returns.
Sorry to be so blunt - but I used to work as a domestic violence advocate, and getting these guys out of the house is NOT easy!! Not that you have dealt with that, just in general if they won't go voluntarily, it's a real pain to get them out. If you throw him out, especially if there is an OW, the cops are usually very helpful.
Keep your head high and take care of you!! ((hugs)) Tricia