My SO has a neuro appointment next week to be evaluated for dementia. He has lately forgotten what day it is multiple times in the last week. He gets confused about appointments and thinks they are a week earlier than they are or he forgets them all together. Today he got a confirmation text for one of next week's appointments and somehow thought that meant he had an appt. today and took off while I was out of the house. How can I discuss this with him? He's already angry with me for questioning him and telling him to come right home as I was worried about him out driving alone. He hasn't driven by himself for the last three weeks when it became obvious something was wrong. I know I have to take his car keys away, but I expect it to be difficult. Hopefully I'm wrong and it's not dementia, but I don't know what else it could be. All of our friends have noticed and commented on his behavior and are also worried about him.