This may sound weird, but it helped me and then a friend of mine in pretty much the same situation as yours. Switch your gaming addiction for another, better on

This may sound weird, but it helped me and then a friend of mine in pretty much the same situation as yours. Switch your gaming addiction for another, better one - fitness. Unlike gaming, fitness will give you an actuall goal, improve your will and motivation, health, mood, etc. An advice: whenever you feel the gaming urge - go out for a jog. When you start looking and feeling better - it will become another adiction.