Has my friend lost control of his weed habits?

Hey fluther!

My good old friend, which I’ve known since I was 7 years old has started smoking a lot lately. It started with a joint now and then at parties and at random times and I was okay with that, and i still am. Both of us have been busy the last weeks so i haven’t talked to him much. I just talked to his ex. She was worried as hell. Turns out he’s been stoned pretty much all the time the last weeks.

We just had our final exam, and he has been stoned all the way, it makes me realize that this isn’t just something he does at parties anymore. It’s just wrong to smoke during that time, I wouldn’t get drunk during my exams, that’s fu*ked! You know what he wants to be? A Psychiatrist! That’s eight years of education here! I find it hard to believe that he will return to a life of education and routines after a summer of smoking every single day.

What’s the right thing for me to do?

I could talk to his parents. He’s 18, so legally in Norway, they can’t do anything, however I know for sure that they will help him, but he will get pissed, and I’m not sure if he’ll ever forgive me.

I could talk to him, but i know he’ll only come with all the stoner talk… “There’s a lot of people dying form drinking, there’s no one dying from smoking” and “I’m not addicted, you can’t get addicted form weed” you know the game…

I could wait and see what happens, he’s just been this bad for a little more then a week, it might be just now. Is this just a period of his life that will wear off as he grows up?

Please help me with this one, I’m worried as hell, and so is his ex.