Jen, I've been doing this (spare bedroom)for the last 5 months. Moving out is inevitable and may actually do our R some good. Unless W slips on some ice and falls on her head today and says she wants to give our R another try, I am moving out.
My R with W improved a lot after she moved out. The whole 'living separately' thing really just emphasized the fact that things had changed.
At least moving out will give you the freedom to do a lot of things for yourself without feeling that your W is watching you or whatever. You should also find out what moving out will do in terms of affecting your ability to live in the house again - Some counties/states restrict you if you don't live somewhere for a while, even if you own it.
