What's wrong with me?

I've lost interest in the things I used to cherish most. I can sit and stare at nothing for hours while everything goes idle without moving an inch. I don't show much emotions anymore and strangely enough, I talk in the third person (I'm working on that). I've become mundane and seldom feel much glee. I don't care for my fears or much of anything anymore. I do have aspirations but at times, it feels like nothing more than that. I work 42 hours and attend school. I don't really go out. I can't concentrate on a book anymore. I've read hundreds of books. I don't care for food anymore so I've lost weight. During the night I feel like there's a little black cloud hovering over me or a warping black hole of despair slowly sucking me . I've developed sever insomnia. Note- "Emo" is not short for "Emotional." I truly believe that 3/4 of todays teens are pretentious and I doubt the legitimacy of their angst. I don't think I'm depressed because I don't cry but I do think I've become someone plain