I totally understand what you're feeling. Others will yell "detach, detach," but my view is that you have to come to that point on your own.
Keep trying and at least do your best to put up that front, but it's very hard until you come to that point on your own. Until you really feel the need to let go or continue suffering you won't know real detachment.
It is lonely and your world has been rocked. Do your best to comfort yourself with whatever small thing helps. But letting the pain hit you and wash through you is healing, at least it was for me. Just remember that you can't hold onto the pain. It will make you bitter and angry. A life of bitterness isn't worth it.
~Mark
Me: 38 W: 34 Together: 9yrs 1st M: may '03 1st D: april '08 1st bomb: june '08 remarried: oct '08 2nd bomb: aug '09 --(W asked for D one week into 3 mo. trial separation which was meant to save our M)