Well, there are some here who are addicted to posting at FR. It is fundamentally no different than your addiction to vidoe games. I myself spend too much time here, but I won't allow it to interefere with my business.
If you are not too old, have you considered military service? Six to eight weeks at boot camp will help break that addiction, and you will follow it up with another eight weeks to a year (or more) of advanced training. Military service will help provide you with discipline and structure that you apparently lack. There are some great skills you can acquire and occupational areas that will translate into good paying jobs in the civilian sector. Just be careful choosing what you go into.
Just one idea. It might not be appropriate in your case. Good luck.