I've become acutely aware of how important friends and family are, and how hard it is sometimes to simply maintain relationships. I don't have many friends, but I'm especially close with the few I do have. This being said, when these close friendships drift apart--due to distance, lack of communication or lack of effort--it can hit you like a ton of bricks. Some friendships can survive years with no communication, and then pick up again as if you never left. Most require more work than that.