"It's brilliant, being depressed; you can behave as badly as you like. " -- Nick Hornby

I stayed in bed today until  had no other time to spare. I got out of bed, got dressed, put my shoes on, and walked to work. I had a good day at work. I like most of the people I work with and even have a crush on this one girl (though I would never admit it to her).  I left work almost forty-five mins. ago and now I feel like shit inside. Why?