I've just been in London for a week on a course. Managed to meet up with an old friend. We talked. We drank. We ate and drank and talked some more. We walked and we drank. And we talked some more. Then it came to that time when you have to go your separate ways. You say goodbye. And realise there has to be a better way of parting. There are things you didn't say. They'll have to wait for next time.
Anyway, here's a link to a cool cartoon about goodbyes.
I recommend xkcd, a webcomic of romance, sarcasm, math, and language.