We live fairly centrally in London and over the years lots of our friends have moved away. I know it's inevitable as few people can afford a big enough house to accommodate 2+ children where we live. We do still see them but much less often.
Yesterday I found out that two couples we've become friendly with over the last couple of years are moving - one to the outskirts and the other overseas.
AIBU to be sad that our social circle seems to be shrinking so fast?