I think everyone has been pretty spot on in what they've been telling you.
Would your boyfriend potentially be more interested in the idea of studying something? He could even do something that lets him do part (or even all to begin with if everyone would be okay with that) from home. You keep saying how much he loves video games, tech and computer stuff, so a study option that has a focus on one of those could interest him? Or focusing job stuff on those industries if you're not doing that already. If it's simply wanting him to feel like he's doing something more with life or wanting him to be happy, you could suggest a youtube posting run throughs or something hobby to help him feel more involved in the world.
Does he have any friends you could talk to about encouraging him to do something?