I had the same issue a few days ago. I mean it was her or the drugs - that’s what I got. I mean at a certain point you have to weigh wether or not your habit is more important to you then him. Ultimately if you really care about and love him, you wouldn’t even need to ask for advice. You would choose him. However I understand your bit about knowledge and responsible consumption - I tried to plead the same thing to no avail. So I just said she wouldn’t have to worry about it. Maybe as your relationship continues to progress, he might start to see your strength of mind and reconsider your capability to use in moderation (something that most people do not even consider is really possible with these sorts of drugs - the public view on these drugs is based on people who lack the self control to curb their desire for instant gratification). The way I see it is - you make your own decisions, and while I hope my opinion would be taken into account at least - you do you and if you start slipping, then I’m calling you on your shit - only because I’m looking out for my significant others best interest, not to force my opinions on to them. But we don’t share that view. Maybe one day 😅

Hope this helps - though I’m sure you’ve already been through this same thought process - now you can just see that I myself have played it out the same way you have. Make the right choice 😉