5 kids in our fam. 3 are close by. They have all moved on with little or no problems. I know what I need to do on a daily basis but can't seem to get it done. I try to see her everyday, at best that is all I can do. Some days I can't get motivated to even leave the house. And I see her symptoms starting in me. Our family isn't close now that dad's gone. She calls me 25x daily asking for someone to call her, but doesn't call the others just me. I don't know how to respond. They have family where I do not I was the go between. How's mom? ... Why don't they visit me? I'm having problems dealing with both sides. Don't talk to family and have no answers for her. Sorry for rambling I can't put a thought together. What do I do to save me without the guilt and confusion?
I'd also work on letting the teams of professionals who are responsible for caring for your mother do their jobs and not continue to allow her care to dominate your day. Is the facility she is in, able to meet her needs? If not, I'd explore one that will. If they are meeting her needs, I'd discuss her phone calls with the staff and arrange that they be curtailed. I'd keep in mind that she likely calls so much, due to forgetting that she's already called so often. Putting constraints on this is only reasonable. I'd work with a counselor on how to cut back on the number of visits to the facility or the length of the visits.
If you are more comfortable with yourself, your siblings may feel more comfortable with interacting.
As far as answering you mother, I'd read material on how to handle family members who have dementia. The goal is to keep them happy and content. Only messages of comfort, so, you could give her any answer about others visiting. They are working, bad weather, car broke down, etc. She won't likely remember anyway. The point is to keep her happy in the moment. I have no idea what your guilt is about. Maybe, you can discuss with a counselor.