Those families struggling with Alzheimer's, as hard as it may seem, and though there is little understanding still, just be you always, because they cannot be them! They may have forgotten, but you shouldn't. Is it hard? Yes. Is it hurtful? Yes. But never, ever forget, they are still mom, dad, uncle, aunt, and human beings. Yes they need help, yes they may even have to go to a care facility, but they are still who they are, no less!
They just don't remember and it is hard for them also, trying to figure it all out, looking at you, knowing you belong in their life, just not where! They try, they do, they just cannot help what has happened to them, and that is no punishment toward you, or them! One thing you can never, ever forget though, is you! Take a break, get some rest, find a support system, and what ever you do, do not be or feel embarrassed.
You are not alone, and there is nothing to be ashamed of! Hang in there and just be you for them, you never know when that one moment will come, that they will remember just a little, and how blessed you will be because you were there!