what do I do ….????

i need advice and need to vent. it’s like a repeating cycle and idk if I’m in the wrong or if my bf is. Every week is an argument over weed. He believes that he should be able to smoke pot as much as he wants but it’s legit affecting our relationship. It makes him extremely lazy and unmotivated and it causes so many arguments. It’s not 1-2 times a day, it’s legit 10 times a day where he’s staying up til 4am. Am I crazy for being mad and starting arguments over it? I get he had a tough upbringing but there’s other ways to cope with it.