I have a friend who went through this during the Xbox 360. The obsession was damaging his life and enjoyment for the medium. He wouldn't add games he wanted to play to his profile because of the fear he wouldn't complete it. He'd spend months grinding out achievements involving killing thousands of enemies. He'd buy terrible games where he could earn an easy 1000 points. I think the change of (console) generation helped reset something for him, and he realized how much time he wasted on certain achievements.
Try playing on PC and/or pre-achievement consoles for a while.
Try playing on PC and/or pre-achievement consoles for a while.