I know it may sound really harsh but : Get a life.
Or at least, forget about MMOs, you might think you'll just play a little or whatever but it'll always end up being the same. If you're into gaming, get some real games, games that you can play when you want and that you don't have the impression that you're wasting your money when you don't play. If you really want to play with people, play multiplayer with friends, not online friends, real ones...
Do things you like, if you think that you don't like anything else than Wow, then find something you like. Do you play any instrument? Are you good at any sports, anything? You like arts?
If you don't play any instrument, ask your parents about seeing some professional that will help you find and instrument you didn't even think you would like.
Maybe you could draw things you like, make something creative.
Why not put all the time you'd be wasting into an online game into something more physical? Something you could be proud about?
You can show musical talent to people and they'll be impressed if you're good, or at least if you're getting better. But they don't give a damn if you have a level 80 paladin or whatever, seriously, people really don't care at all.
Try to find things you like, other than being virtual good for nothing things.
Try and think about it a little. Are you getting any benefit from playing an online game so much? Are you developing anything? It's not even like it was a strategy game where you'd have to be smart. You're just doing repetitive tasks which doesn't take any effort but only time, time you are wasting!
Get up and do something of your body, get good, get better at something that will make yourself proud about it.