How you lose contact with friends over time. How you won't talk to somebody for a couple days, then that turns to a couple weeks, next thing you know is you haven't talk to that somebody for six months now. Because of that continuing span of time when you stopped talking to that person, you're really unsure of when that friendship ended. I think that's what lessens the feeling that something is missing. But once someone is taken from you, so abruptly, it really hurts. It's funny how that it is.