How often do you have sex in a relationship

I’m just wondering because my boyfriend and I have been together almost 4 years now, we’ve lived together since we started dating. Literally every night he wants to have sex even if we don’t get home until 1am he still wants to have sex before bed. Sometimes we argue because I’m tired and he’s in the mood and he makes it seem like I’m the worst girlfriend for not wanting to do it every single night. He complains and says I’m acting like I’m old and married 🙄 it honestly feels like a chore but if I say that he says I don’t care about his needs