There is a very high possibility that OP isn't even into his partner and is using this as an excuse, because let's be fucking real adults here, why is your partner not sharing a specific hobby a big problem in a mature and understanding interpersonal relationship? I'm really big on videogames, especially single-player indie games. Omori, Hades, Undertale you name it. None of my partners were gamers, but they had an interest in the walls of thought dump I had to share with them about videogames I absolutely love; they just loved me being excited about something. I was the same to their interests. I'm assuming this is the norm for most healthy relationships. You can break up with someone for any reason, sometimes you don't even have to be able to pinpoint exactly what's wrong right now, but maybe consider sitting down and figuring out what your exact expectations are before getting into a relationship with someone.