How lucky are you to have something that makes saying goodbye so hard?  It is better to have loved and lost, than never to have loved at all.  Don't mourn because it is over, celebrate because it happened.  

Bye, Felicia.

Cities don't stand still, they change.  They grow.  People move in, and then they move out.  Booms and depressions happen.  Until you accept that, you'll be disappointed anywhere you go.