Oh Sue... (((Sue))) I do know how you feel. I've asked myself those same questions. The most devoted, loving husband, suddenly was "just acting"- for "years"- and I have to think, how many years? We were only married for 4! Did you EVER love me? And I force myself to stop. Because it will drive you totally insane. But I understand - it's the kind of thing that bothers a "normal" person.
One thing I'd like to throw out at you. You have been given a huge challenge I think. I'm thinking that there is a reason why all these people around you are hurting. You've been given great oppotunities to help others, and you seem to be doing it wonderfully. I'm sure they appreciate it immensely. Give yourself a break today and know we are with you in spirit... Hugs, DBH