why do you think he has a problem with weed? just because he smokes few times a day? you know when you smoke weed its not like you smoke once and be high all day. when i got much weed i smoke like every 45mins-1.5 hours(thats about the time when i start to notice the effects starting to fade away if im at home and dont have anything to do). i might start it right after i wake up(and sometimes i might still be stoned when i wake up, because usually i smoke if i wake up in the middle of the night) and i stop when i go to sleep, because i get tired but not like sleepy tired but annoying kind of tired if i stop in the middle of the day. and i can do this smoking all day long for a week or so, but usually if i got like 10 grams of good weed it lasts for about week. when i was working i had like 1.5 years when i smoked daily(few times a day), but naturally not right after i woke up because i had to work and every other week i got off from work around 11pm-1am. sounds like a problem? well guess what. i havent smoked weed for 2 weeks and i think it was about 3 weeks when i smoked before that, i never had any problems stopping smoking even if i spend a week totally stoned 24/7. even stopping after that 1.5 year period wasnt a problem, i mean it was bit weird not to smoke before going to bed, but i didnt have any trouble sleeping or had any big urge to get stoned, i wanted to smoke, but it didnt feel like i have to smoke.
you see weed isnt like alcohol, nicotine or addicting stuff like that, you can smoke weed everyday for long periods of time but still not being addicted. of course some people get addicted, but thats because they have addictive personality or they try to fill a void with weed and they dont like when the void isnt filled. maybe he actually doesent have a problem and you are just over reacting or maybe he is trying to fill his empty heart with weed? i dont think its a good idea to do that because weed is a spice for life, not the meal itself and if you use it the wrong way it can backfire in a really nasty way.