Nostalgia ...

You go back after ages, and pick up right where you left off. You never run out of things to talk about. Old jokes never go stale. You can't keep a straight face. You want to hug and be hugged. You stay up all night talking about nothing. You order a pizza between five and you never mind who got how many slices or who paid. Something reminds you of something that happened five years ago and it's still as funny as it was back then.

Whoever invented friends was a genius!