I learned too, that it is better to just go along with what they say than try to correct them and explain something they won't understand anyways. I remember when my mom called me one night very serious and told me that she had just gotten married. She said she married the nice black man who came to visit her all the time (she was referring to her male nurse). She was totally convinced that they had gotten married. I was very upset at first, not because I believed her, but because it was such a bizarre thing for her to come up with! Totally caught me off guard! I called the nursing home and they just told me not to worry and that she would probably not even remember anything about it the next day. Well, she never mentioned it again, except to refer to her nurse as her "special friend". Then there was the time she called me and told me she was dead...
This disease takes away the short term memories first and works back toward the long term memories. My mom would think she was still married to my dad, then talk about her jobs she had when she was much younger. She couldn't identify anyone in a recent photo but could tell me every last detail of a photo from her childhood! Her sister also had alzheimers, so I am hoping they can find a cure for it before it gets me, too.
Mitch, if you can't find a support group nearby, there are one's on-line. It really does help to talk to people who have been there and/or are going thru it now. It is true that it is harder on the loved ones than the person who has it, especially as it progresses.