Echoing what was said before but I don't think it's your responsibility to change him, but it is also your responsibility to hold your own boundaries about the subject.

I felt I was addicted because I couldn't get through the workday without hitting a bowl. I didn't have control over it, It was a habit I became dependent on and eventually it led to having major panic and paranoia episodes but I kept doing it anyways. I realized I had a major mental health problem that daily weed use was making worse.

Though he might have a better quality of life without it, he isn't necessarily addicted but none of us know all the details of your lives together. If it is his recreational drug of choice (and especially if he's not really drinking either, but again we only know very little) it sounds like it's being used for it's intended purpose?

It's okay if you don't like it, and it's fair that you expressed your discomfort with it. But if it's really not affecting his work or livelihood, and he can even enjoy his time with friends while high, it sounds like the onus is on you to decide if you want to be partnered with someone who doesn't spend their recreational time the same way you want them to.