Our sitch's are eerily similar: age group, number of years married, I have similar health issues as your H (prob. same one). I've been hanging out in newcomers but my wife went to live with a friend last week.
Also eerily similar: The questions that I have about "what now?!" I barely have contact with her and do not expect that to change anytime soon. I wondered, like you, how she was going to see my changes if we never interacted. Also, like you, I am struggling and working through this detachment business. The emotional reactions are almost identical too.
You story has given me some reassurance. I am new to all this; I can't offer much advice but I have plenty of encouragement.
I'm reading along!
B
ps. Drop by if you get a chance!
My Story: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=1512790&page=1#Post1512790