There are so many different times when we say goodbye in day to day life: when we're dropping mate off home after a night out, when someone close to you passes away, when England throw away a Grand Slam title in the Six Nations... All valid and perfectly sound.
I hate saying goodbye. It's as if you're letting a part of you - however small - die. And sometimes, when you see someone walk away from you, even if you know you'll see them soon, it makes you want to cry.
But that's good.
Because absence makes the heart grow fonder and all that shit.