Boyfriend has dirty ass roommates.

I am beyond stressed. My boyfriend and I have been together for over a year now and he’s been living with his two friends. These are THE nastiest set of people I’ve ever met. My boyfriend is so clean and always cleans their messes, but it always goes unnoticed. They don’t clean the bathroom, kitchen living room or anything. They let the mess get to the worst point ever and my boyfriend is tired of talking to them. I constantly clean mess as well. I take my time to scrub and sweep and mop and they make rude comments or act like they never made the mess that I’m cleaning up. My boyfriend has conversations with them saying simple things like clean your dishes right after using them, don’t leave pee on the seat, etc. even his best friend’s girlfriend came over and literally had her period and left her blood ALL OVER THE TOILET SEAT. My boyfriend nor I weren’t touching that. It stayed for two weeks. At this point I’ve had enough of my boyfriend and I always cleaning even after speaking to them about their mess. My boyfriend thinks that I should talk to the guys because he doesn’t want to make things in the house weird. I don’t know what to do. I spend a lot of time here but I’m getting annoyed.