So what if you didn't stop playing games? I'm in my mid twenties and i've outgrown my interest for gaming. People change, maybe not everyone, but don't freak out if it happens to you. Just accept that you don't get a huge satisfaction out of it anymore and seek out new hobbys. Building model airplanes or whatever.
Fun != Gaming. I used to trick myself to thinking I was still a gamer. But going from 3-4 hours per day to 0,5/1-hour a week i just had to realize that gaming wasn't fun anymore and stop forcing it. Does that mean i don't have fun any longer? No, it just means i find other things more amusing. Being social is one of those things.