Caregiver grief

Caregivers of loved ones with dementia all know the unusual grief we feel having lost the person we have loved for so long while still having them physically with us. I am grateful she is here, but saddened that her personality is so altered by the disease. I know she is hurting, especially when she is occasionally aware of her memory failure and cannot remember the birthdays of our children and grandchildren; remembers things that never happened, while denying things that did. She sometimes even asks, when looking at a photo of a granddaughter, who her parents are. Since I am with her 24/7, I help her save face by changing the subject when she asks a family member the same question fifteen or twenty times in a five minute period. I am glad November is over, because she habitually asks me, hundreds of times, what month we are in, I tell her November, and then she asks what day my birthday is. We have been together 60 years as of December 4th, 2023. Strange that she remembers the month but not the day. She asks if we had any children born in November. I remind her yes, one of our sons and also our daughter. I have been advised to "meet her where she is" (mentally), and I have been doing that for quite a few years now. Not sure if it really helps anything, it's just a "one day at a time" situation. God help us.