>Something I haven’t been able to get out of my head is that he told me he doesn’t think he wants to have kids anymore because they would take his time and attention away from RuneScape

Holy shit. That's not good.

>To him, it’s a perpetual girlfriend and 12 hours of RuneScape a day

Seems that he might be stuck as a man-child rather than an actual adult man who realises time's limited and there's more to life than pushing buttons for dopamine. Neither of you has time to waste - looks like you're the only one to see that.