The misunderstanding what you said—yes, I can relate to that! I give my husband simple directions to, say, get something from the kitchen or wherever, but he can't seem to focus or retain them. And that's when I know he's actually heard whatever I said. He tells me stories from his childhood (which I've heard many times), but then he'll tell me stories about things that happened since we've been together. That's when I ask if he knows who I am, and sure enough, he doesn't. Sometimes he knows my first name, but he doesn't know my relationship to him. When I tell him how long we've been married (over 30 years), he's surprised.
It wears on a person after a while, and then we feel guilty because we know they can't help it. We have helpful neighbors, but family is in another state (where we moved from). We have considered moving back there, and now that our old dog has passed, we can make frequent trips there (it's about a 3-hour drive one-way) to check things out. Yet I'm not sure being around family will make things any better. He already doesn't remember many of them—his kids usually, but not their spouses or the adult grandkids, all of whom he spent a lot of time with both before and after we moved.
I'm coming to the conclusion that the best way to plan what to do next is to imagine myself alone and then decide how and where I would want to live. My husband will be 90 in a little over a year, while I'm approaching 80, so I might be the last one standing. But if something happens to me first, I know his children will have to put him in assisted living or memory care. He could not live on his own, and they aren't young either.
I'm 79, my husband 76 and steadily declining with lots of the symptoms you mention. He still knows family members but sometimes he forgets their names. I hear "What's Her Name?" and "What's His Name?" an awful lot. My adult son and daughter live near me, but both have busy lives and don't have much time for me beyond an occasional visit of maybe an hour. That's fine, but I realize I can't count on them for the kind of practical help a professional caregiver could give. Now I have my recently diagnosed aneurysm to worry about and can no longer assume I'll be the last one standing, so I'm trying to make plans for being alone. I intend to remain in my house until my children tell me I have to do something else. I worry about the expense of all this. I worry a lot and the stress is not good for me so I worry about worrying. I'm so grateful for this group!