Have name-changed for this.
Have ME/CFS. I have some times where I'm under part but as OK as I can be, but have alot of periods of horrible sickness that few people see, where I'm too ill to do anything. Generally, its restrictive and its pretty debilitating in terms of physical activity and also work.
I think its not the only thing, but it has had a real impact on my friendships and relationships. Either people ignore that I have this illness. Or they just talk about themselves a lot, one friend to such an extent that I felt it was insensitive, and I've distanced myself. I have few contacts and friendships left. Even if I was No. 1 healthy person I am sure I would struggle with some aspects of friendship. Its just with a chronic illness, they seem to be magnified. I feel I have to make my own inner life very much, if that makes sense .... but I do crave fun and friendship occasionally.