*Please tell me i'm not alone!*
Michael Jackson tells you http://www.youtube.com/watch?v=pAyKJAtDNCw&ob=av3e
Such thing happened to me once...or twice. Just limit your gaming time to 1 hour per day and in 2 weeks you will have good healthy sleep again. Start living your life.
And don't think that it's that easy. Mental addictions are difficult to get rid of. All strong will power is required.
Another variant is to take a vacation for half a month and then you will lose some interest in spending whole day in front of your PC. But still great will power is required.
Have fun! :)