The statistics on sanity are that one out of every four Americans are suffering from some form of mental illness. Think of your three best friends. If they're okay, then it's you.
Disappearing can be quite the coping mechanism for those of us who fear abandonment the very most of all. If we disappear, you have to find us. You're the one who worries. We know where we are, but you can't leave me. I'm in charge and doing the leaving. Not the other way around.