In life you make friends, you move away from them (physically) and make new friends and the cycle goes on. There are friends from high school, you leave them behind and make friends in college, leave them behind and make friends at workplace, you quit work and make friends at a new workplace and it just goes on. Before you realize, you know more than a 1000 people that you've been friends with at some point. But still, there are a bunch of folks, who, in-spite of not being in touch for ages will start off a conversation where you last left. They are your real friends, friends you should never stop being in touch with. I've been blessed with such awesome friends in life and from now on, I make it a point to keep in touch with them. E-mail, Facebook and IM can never replace a real conversation.
It just sucks that we have to grow up and move on, leaving behind friends from various stages in life. Yes, you meet new people, make new friends, but no one can ever replace some friends.
Dedicated to all the awesome friends I've ever had!