I have a very close friend. They have been diagnosed with BPD and have admitted to and have made obvious that I am their favorite person. I have done research into bpd, significantly, for their sake. I find it difficult to be in that role because I have a lot of personal issues and it feels like they want things from me I can't provide. I understand they need these things, but when I let them know they can get them from other people and I'm not a good fit to provide those they always seem to act like it's my job to do so. I feel like they prioritize changing my boundaries over living with them, because whenever I set a boundary they act like it's an issue I need to work on. I try to message them or let them know when I can't talk, but even when I make this clear they still send me 10-15 messages and call me. I don't want to end our friendship, I value it a lot but I also don't want to feel like someone's play thing, and be afraid Everytime I'm even somewhat close to someone else that it will cause them to be thrown into a downward spiral. I feel like I'm being pushed away from the people I care about and it's terrifying. They ask me how much I talk to other people and get upset if it's even close to the amount I talk to them.