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You're maybe grieving the changes in your friend, rather than the loss.
She's made bonds recently with people in the hospital and that is probably not that unusual when one thinks about it. <sigh> They're all dealing with pain of some type and although it makes you uncomfortable, it's maybe that sign at last to move on for your own sake.
It was time to move ages ago by the sound of it. I'm only saying that because I've followed all your posts from the beginning and this is what I would do. It's what I would advise my daughter to do in the same situation as well.
I know you have some health problems of your own and that's the worry. I hope you have some help and support if you do indeed choose to move. I'd help you move if I could but I am way away in the southern hemisphere. Please keep updating here as you have been lately.