You look at your friends-list, and can't really get yourself to say "Hi!" to one of them (or are reluctant to bother those who you plagued the previous days already, or you know they are occupied otherwise).
You look at your landmarks, and can't really decide to visit something.
You look at your projects, and don't feel like finishing one of them.
You feel a void and and emptiness inside, and nobody is there to save you.
And you can't save yourself.