It has been my experience that the most dangerous kind of unhappiness is the kind that creeps up on you slowly. If you suddenly get dumped by your girlfriend, you think “Wow, that sucks and I’m in pain,” and take steps to make yourself feel better. But when things get just a little bit worse every day, you forget how it felt when you were happy. That’s what happened to me. Almost without noticing the change, in fact, wanting not to notice, I became housebound and solitary.