im in the same situation.. only when i first got involved with my boyfriend he lied & pretended he didnt smoke weed at all.. he actually quit doing it for me for 2 months..
then after spending 5 months long distance, i come back & he reverted back to his ways.. i thought i could learn to accept it & live with it but it was worse than i imagined.. he lost his temper worse than ever before & we argued almost everyday..
i stayed with him coz he would cry & say sorry & i felt sorry for him battling his addiction.. but when i tried to help him stop, he swore at me, he just put his addiction as his priority, before me..
now im expecting a baby, after 4 months of putting up with his lifestyle & trying to help him clean up.. now i have to put by baby first im leaving im not ever going back to him, id rather be a single mum & raise my child abuse free rather than with an abusive father. i dont care if he changes ill always remember how he wasnt there for us, how badly he treated me when i was pregnant with his child