Why do these things bug me?

I constantly check my number of subscribers to my blog and I constantly check my fan page on Facebook. If someone leaves it bugs me to death. Like on my fan page. I had 48 fans, then someone left. (I have 48 again because a friend joined) but that means someone I know actually signed up then took the time to remove the page. It's like they said they no longer want to be associated. How silly is that? Not them, I mean me. LOL