"The other thing was a feeling of loss from some of my friends up there. The dynamic of our relationship has changed... and... well, I feel totally unwanted there. I guess I've accepted it, but it still hurts."

(I don't know how to italic this, but you get the idea)

The same thing has happened to me, so I sympathise with you. It's been like that since about my 2nd year away from home, and it's not very nice, but that's just the way it is I guess. I am not really looking forward to living at home again next year.