I've tried explaining this feeling to people so many times. Unmoored is a good word.
We now live in a place where the locals are warm and welcoming, but I'll never be one of them. My kids are, but I'm just a little different. When I go back to where I was raised, I'm no longer a local there either, just a little bit different. It's more than the place itself changing. It's as if there is some continuity that's been broken somewhere.
It's not bad, just odd. I can't quite put my finger on it.