Bored and tired

I feel like a stagnant pond. I'd probably feel better if I spent less time browsing inactive LJ-communities, playing computer games, and watching old YouTube videos, but the only real-world activities I have any interest in are my weekly art classes and voice lessons. I drew pictures all the time when I was a little kid, but I still draw like a little kid when my art teacher isn't there to help me, and that's embarrassing. I used to like reading, but nowadays it just feels like a chore. I would have sat and listened to music for hours if I could, but now I wait impatiently for the song to be over. I don't even watch as many movies as I used to. My life is an endless cycle of school, homework, and Internet, one I don't know how to break. What's wrong with me?