The only person who can really stop you is you... but if it's a true addiction, cognitive therapy can help there too... and with your meds, it's possible.
You know, there is a wealth of information out there on the internet, rather than waste all your time with games and such. You can learn foreign languages, hey, even increase your English language skills and reading comprehension... remember the maths info? on the internet... surf the net... find the sites.. learn do you go to the nasa site? Have you see the latest pics of mars? What about the satillite photos of the earth, can you discern what countries they are showing? Put that energy into making you a better person, more educated, and you won't have the guilt of spending all your time on forum sites.