Hello and welcome to PC.

I do think that you might as well leave your bf. As it is, you're unhappy with his consumption of mary jane. While I can certainly understand your unhappiness and stress response to being essentially lied to about his consumption of the drug ~ it does sound as though you have firm limits and he has crossed those boundaries a few times too many!

A few words of experience... don't expect to change others. Your bf may agree to your limits verbally every now and then, but actions speak louder than words. His behavior won't change anytime soon.

It is sad and hard to leave sometimes, better now than later on down the road when children have been brought into the picture though! Very gentle hugs to you. Take care.