One of the many difficulties associated with caregiving is that you will tend to disappear. The person you are caring for may be belligerent, ungrateful, treat you as though you were still the child. Deep down you know that they have no malicious intent.
As the caregiver, I had to start over by redefining who I was in the marriage relationship. The progressive dementia meant that this process would be one-sided, would constantly be shifting, and would always move toward greater loss.