DBing for yourself will eventually lead you out of limboland. Either with or without W.
When you are confident enough within yourself, you can say something like this (of course modified to fit your situation), that I "borrowed" from "Passionate Marriage":
"I've been doing some thinking, and I have decided that (four very powerful words, those -- remember them, as we'll use them later, too) I need some space. I'm questioning whether or not I want to remain married to someone who would treat me so poorly, and who would disrespect me so much that you would suggest I 'try out' for the position of being your wife for 3 months. You need to find yourself a place to stay, by the end of the week, because I have some thinking to do."
Jeff,
I can see the value in what you suggest. But, this would seem to be nothing but pressure, which is the opposite of what robx seems to be suggesting.