Well, my brother 'introduced' me to the NES and SNES because we had both for some reason. That was probably that long ago. I'm only 29 and I can easily say I started when I was four or five.
It's more of life love rather than an addiction I think, but I've noticed in the past year that I just sit and look at the icons of my installed games, look at GOG rinse and repeat. It's as if I want to force myself to play something, for the sake of playing something.
When The Witcher 3 came out I thought I'd do the same thing I did with #2 and finish it over two sittings. Took me roughly six months to finish #3, because I couldn't play for much more than an hour at a time without feeling forced.
It sucks, honestly. I mean, I feel some pride that I've not even batted an eye at gaming; but at the same, I've lost interest in something I've loved literally all my life. I feel bad because my kinds enjoy watching the colourful games from time to time, like Renowned Explorers and Don't Starve.
edit: cheers for the replies everyone :)