If you can't beat them, then make them join you. I'm talking to dudes with non-gamer girlfriends who keep harping about how much time they spend on their video games. You don't need to explain anything or change your gaming habits; you just need to get creative and get her to actually want to play by preying on her weakness for cute stuff.
Like a plushy game controller.
You'll need a Flora board and some conductive fabric in order to get started. Becky Stern goes through each step in the video above, while the patterns for the plush controller are available at Adafruit. This might seem like a lot of trouble to get your girl off your case--but hey, every gamer needs his game time.