How do you respond considerately when your mom's dementia progresses to babbling about nonsensical things and imaginary visitors and suitors?

I've been posting for a while, Mom is 94 with progressing dementia and chronic congestive heart failure. She is now on hospice, not be cause of imminent death but because she is failing and she isn't going to get better. I got used to the short term memory deficit and learned how to compensate with her for it - then started the long term memory deficit. She is now progressing babbling about nonsensical things, staring at the ceiling and talking to people and talking about imaginery suitors (who by the way have lots of money :)). She offered to find me some too - no sweat! Ok, I can play along, but it is getting harder to know how to answer her or deal with this phase. I Know that it is affecting me emotionally since it is getting harder and harder to connect with her and often she doesn't understand what I am saying to her. When I need to get through to her for practical reasons, she babbles on about other things. It is disconcerting. I understand it is the progression of the disease (and she is sweet), but sometimes I get tired and don't hve the patience to deal with it or even know what to say to her. I know it is her reality, though it is not reality. All the thoughtful posts on everyone's experiences have been helpful over this past year. Guess I need to hear from the rest of us in the same boat or who have been there. Peace and prayers for all!.