You come and go

What does it mean to make friends who have a significant impact on your life, only to lose them shortly afterwards?

A year ago today I first met someone who, over the following three months, became a very good friend. He was, I think, one of the most interesting people I've ever met; but at Christmas he left Edinburgh and we lost contact.

I still believe the line "when you go, you're gone forever" will be proven false.