It's painful. Living in Utah, it's a common-place occurrence that non-natives move away. And leave behind friends who miss them very much.
My BFF Karen moved away, back home to be near her family. Who'd blame her? Not me! We (me, dh and children) moved "back home" to Utah for the same reason, and I left sad friends behind myself.
Here's a little piece of prose I wrote, not long after Karen moved away:
is there a more
raw display of friendship
than the stinging
tears of separation?
I miss you Karen! I love you!