Hiya Angelwithoutwings. Welcome to PC.
It doesn't sound like it is you.

He appears to be addicted to his gaming. The game reality may be more real to him than the real reality. If that's the case, this is not your failure. I lost my bf when I got sucked into a virtual world of my first MMORPG, and it was not because he was failing me in some way. I liked being my game character, much more than living my real life. Real life became a necessary annoyance, something that dragged me from the world I wanted to live in. I didn't quite get insane enough to quit my work, but I wished they would fire me, so I could play all day long. I did play all day long each weekend. Eventually the game changed, and my life there became frustrating more than fulfilling, and that was my salvation. By then I have lost my bf.

Until he starts seeing his gaming as a problem, there may be nothing you can do.

You can ask him about his life, maybe he knows why he finds gaming so much more better than living, but maybe he just doesn't think about it, but lives for games, and that's that.