Stan,
You poor thing! Surely there are SOME advantages to living with your fiance'? My husband had the same feelings, moving into our home. His lack of order couldn't really infiltrate the bulk of this small house, he has now taken over the back bedroom for his gun stuff, piles of papers, etc., etc., and unless it gets too bad, never a word is said. Perhaps you can negotiate a deal for a corner somewhere. Good luck.