Just be very sure that a seperation is what is best for your situation. When I look at my sitch I see it as a double edged sword, because now I live away and have been unable to effectively DB the way I think would have been the most beneficial to my W. BUT had I not moved out I may have never found this site or read any of the books that I've learned so much from(you've already done that). Just make sure it is the right decision before you/she move out.
