Hi I agree with previous posts. My OH doesn't know me ,our home or himself when he looks in a mirror!
In fact I think one reason pwd think there are more people in the house is because they see us reflected in the mirrors. My OH told me there was an old man'over there' pointing at the bedroom mirror!
He always asks if the others are coming to when we go out but I sure it's because he has seen us in the long hall mirror! He often is seen nodding ,smiling and thumbs up to his reflection! When I told him it was his reflect he wouldn't accept it was him even though we waved and pulled faces!
My oH also sees a boy and that can be amusing as it's often a mischievous little boy!
Sadly, relationships change as my oh no longer really knows who I am
I'd suggest finding dementia coffee clubs ,groups and singing. May not have been either of your style , certainly not ours, but quite honestly they have been my lifeline. Speaking to others who know what it is like.
Best wishes