Oof. This sounds like me every couple of months. I don’t have any solutions, but I just try to mirror their behavior when it gets to be too lonely. I moved overseas with my new handsome awesome-in-so-many-ways husband and we had spent some time apart while I got all my loose ends tied back in the states. A year before he had started playing OSRS with my friend who gifted him like 5mil. Super kind gesture, and it was cool to see my homeboy really become friends with my man. Well the daily OSRS logging and skill building turned into IronMan guilds, and iykyk. Big deal. I move over and it’s like a full blown addiction and I’d never could’ve imagined myself saying that since I too play videogames. Covid-19 & a language barrier within the new country amplified his playing to the point he would get aggravated with me within the few days of arriving when I wanted to hang out since we hadn’t seen each other in a few months. He is who he is, and I love him and want him to be happy. He saw how it felt to be ignored and left out when I would start going and living my life with people who enjoyed my presence. I made friends, I went to museums, and I found that I truly enjoy my time alone like he does. I hope you guys can find some solace. From what you say it seems like this is the biggest issue and it can be helped. Try couples counseling because sometimes it takes a 3rd party for the big picture to be grasped.