What do you really love about your boyfriend? How old are you two?

You said that he is/was a recovering addict...what is the addiction to? In my experience, addicts will not stop using until they truly want to. That is an absolute necessity!

I would say that what is important is your personal views on your bf using. Your views are yours, and those are the ones that may skew perception in one way or another. If you believe that using any non-prescribed drugs is wrong, then that's what you believe. If your bf sees things differently, chances are he's going to have this problem again someday. It's just a matter of time before this issue pops back up again in your relationship with him.

I wouldn't necessarily take your bf's actions as a sign that he doesn't care about you. Rather, I would look at it that he doesn't think that it's a big deal. He doesn't agree with your perception.

Imo, what it all comes down to is how deeply you hold your views. It seems to me that your view is very strong, and I'd advise you to move on. You should stay away from other men for a while (until you're actually over him & ready for another relationship), and stick with guys that have similar beliefs to yours. That's my advice...

Best wishes to you!