When will my boyfriend “grow up”?

I know some adult men still play video games and maybe even watch anime, But he does both. And he constantly talks about how random action movies motivate him to one day become a “ninja assassin”. When we first started dating, it was cute because i thought he was joking but after 6 months i realize he's serious. He legit wants to become an assassin. And he wants to play videogames even when in his 50s, all while not exercising. He already has begun to look like a big kid walking around dressed in too small anime graphic tees/backpacks/shoes. Yet he's 20. I have nothing against anime and games, but he's overdoing it people 😔
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I no longer game (stopped after first year of college, he's on year 3) but even if i still did, he's PS and im Xbox so we hardly could even play together. And I've tried anime with him but its just big tits and swords. I want rom-coms with a little action and less tits. Im not trying to fully change his hobbies. But i dont want him to consider an assassin career and i really want him to exercise more than he sits around playing games
When will my boyfriend “grow up”?
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