Hi anything....I was wondering if the games your playing on the computer are those "first person shooter" games the guys like so much? The reason I ask is that it seems there are many, many people that have an addiction to these types of games. And now since you can play them over the internet with your friends even it is bigger than ever. I am a girl that grew up with the original Atari, stone age right? So I have never really gotten into or seen the fascination with these types of games. However, my ex-husband would spend hours every night playing with his friends after work and on weekends. It was as if nothing else existed.
Anyway, on to your question...you just need to go at this problem at a different angle. Everyone has been saying to get off the computer which in hindsight is a wonderful idea but, you would need use of your computer for school work. And the temptation would be too great..right? How about doing a reward system with yourself? Such as you come home from school and get your studying done first thing then your reward for that would be being able to play your games. Also, instead of trying to just stop playing altogether maybe limit your amount of time to one hour and stick with it. You sound like a smart guy and just need to learn to discipline yourself when it comes to these games.
Good luck and let us know how it goes....