I (25F) hate going to my boyfriends (33M) house

My 33M boyfriend and I (25F) have been dating for about a year and a half. The entire time we’ve been together he has lived with his twin brother and I’ve lived alone. Anytime we hang out at one of our houses by default it’s almost always mine.

I really hate being at his house; It is in constant disarray. Bathroom is ‘cleaned’ maybe twice a year, dishes are never done and when they are there is still food on plates/ utensils, two kitchen trash cans that are always full, flies everywhere, food rotting in the fridge for months, I don’t feel comfortable walking around the house without shoes on because of how disgusting the floor is- I tried walking around in just socks but the amount of times I’ve stepped in random puddles of god knows what was too much. The last time I slept at his house I got two hours of sleep because I kept getting bit by a bug, I really couldn’t handle it.

This morning we got into a bit of an argument because I assumed we would be hanging out at mine last night and that I ‘never consider where he wants to hang out’ which is true. His house is not an option in my head. But he got extremely offended when I expressed that I feel disgusting when I stay there, even though I’ve mentioned to him multiple times they need to take better care of their house.

I really don’t know how to navigate this, part of this was just to vent I guess. I get why he would want to hang out at his, it is nice being in your own home. But in my perspective it’s not nice when it’s in shambles. I also have two cats, he has no pets I’d rather not leave my pets alone.

TLDR: I hate going to my boyfriends house because it is never cleaned, how do I handle this situation