Husband smokes a lot

My husband (of 3 years) smokes weed all the time - it has become twice a day (for context weed is legal where we live). He smoked a lot less than this when our relationship started. He obviously has a very high tolerance, so he says it doesn’t affect him much, but I think it’s too often.

I’ve told him I would like him to cut back, but when he tries he becomes moody and irrational. We came very close to divorce the last time he tried to cut down, because he started acting totally different. He went back to smoking twice per day now and his mood is back to normal, but I just don’t know how I can live my whole life with him smoking morning and night - especially as we have been considering having kids.

We are in couples counselling now and I asked him if we could bring this up with the counsellor but he said no, and he said this is not something he wants to change or work on right now.

What should I do?