<human>: My boyfriend and I have been dating for almost five years; we're both in our fourth year of college. Since he has transferred from a community college to a state university an hour away I have noticed he is smoking a lot more than he used to. Ever since I've known him he has smoked, but I would have considered him a casual user, now I consider him a heavy user who may even be mentally addicted to weed. 

I spend most weekends with him at his apartment in his college town because I don't work on the weekends. He does (retail) and I have seen him smoke before going into work on multiple occasions. He also regularly smokes before going to class. I don't live with him, so I don't know exactly how much he smokes, but I would guess at least once a day. On days he works, he likely smokes once before going to work and again when he gets home. 

It's especially frustrating because he surrounds himself with people and online communities that normalize smoking as much as he does. His brother smokes even more than he does, everyone around him at school smokes as much as he does, and he regularly visits /r/trees and other marijuana websites. 

What really triggered this post is that this past weekend he went to a Christmas play with his grandma and smoked before attending. To me, not only is this disrespectful to his grandma, it's also a sign that he can't do anything unpleasant without being stoned. I've said this to him before and his rebuttal is, "So what if it makes doing unpleasant things better." To me, this is a really unhealthy way of thinking and living. How can I change this way of thinking?

He also likens smoking a bowl to having a glass of wine at the end of the day which I also disagree with. A glass of wine doesn't change one's mentality or behavior in the way a bowl does. It also is obviously much less healthy. How can I show him that these two things are not the same? 

Sorry, this got long.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Boyfriend smokes weed every day which I think is mentally and physically unhealthy. He smokes before work, class, and even family events. He has an excuse or rebuttal for every one of my arguments. What can I do?