Well I played a game called Runescape for 4 or 5 years, and quit around a year ago. I honestly just quit naturally, aka through irl.
But to help you, I'll give you some options to not urge you to really play, and make you fade away from the thought..
Try playing sports in school (you said your 16, well I just turned 17), and me playing lacrosse really helped me just get off the computer in general. Also I do cross country. Playing sports won't only get you off that topic, but you meet so many people, and it's just an awesome experience.
Also for another option (if you think it's to late to try a sport, which is understanble), you could try getting a job. It's pretty hard to find a job, but if you get one, think about it: you make cash and kill time.
Take this from a past addicted gamer, who now quit because I do both.. Play sports and work on top of school.
Hope this helped.