My example: Shortly after college, I moved to the city half way across the country because my high school friend lived there. And then several other of our high school friends (all from a small town) moved there with their spouses as well, and we'd all hang out and even started a company together for a while. We eventually all went our separate ways, at least as far as what states we live in. (There is still some amount of moving to be closer again going on as well. For example my ex's family and a friend from the state we moved to moved closer to her.)