That's a pretty depressing read. Some people don't have the perfect self-control and do get addicted easier than others which pretty much ruins casual game-playing for them. Video games should be for fun and nothing else, if it makes your school grades or social life worse it's gone too far and if you can't control yourself you pretty much shouldn't play at all. Glad you finally quit though, just stay away from all kind of games in the future aswell.