Breaking up with boyfriend over weed problem

I’m 20 turning 21 soon and my boyfriend (23) has started to constantly smoke weed all day, everyday and it is starting to ruin our relationship. I love him but I don’t like how he constantly smokes weed even when he visits my house, and I ask him to not do it here because of my family. I wouldn’t mind if he was able to control himself, but he just wants to smoke all day and he has stopped caring about school and he’s just bringing me down. His parents have become concerned about his addiction but he doesn’t seem to care. I love him but I don’t feel like dealing with him anymore because he’s just becoming a distraction. He becomes a different person after he smokes and sometimes he becomes aggressive. His addiction caused him to get kicked out of a good program at our university and he still doesn’t want to stop. I want him to get help but he doesn’t seem to think his addiction is a problem. I feel bad because I really love his parents but I don’t think I can continue dating him if he isn’t willing to change.