I feel for you man, I am in the same boat. It is about to be 3 months for me and she went dark last Saturday after we spoke about the marriage. I worry about the same things and I know about detaching and keeping yourself busy but apart from work and now a single father of an 10yr old girl I don't get a lot of time to work on me.
I am going banana's and I have this sick feeling in the pit of my stomach almost constantly. I pick the book up to read and end up saying to myself what's the point it's useless now, but then the next day I'll read some it. I keep a journal but have stopped writting in it since I have been posting. Really this forum has become my only outlet.