Friend stuck on weed

Well I got my friend inro smoking weed last year. But I quit llike 3 months after. But now he is a big time stoner. He smokes so much he gets high and stays high for days. He smokes everyday now. I don't know what to do because I hate being around it...

now. I aslo dont want him going the wrong way. Hes failing every class and hes smokin it and sellin it and hes partying to much! I don't know what to do. His girl cant even get him to quit. So what do you think I should do?

The only things you can do is try to help get him clean,if he refuses,like Slipknot's song Left Behind's meaning,leave him be and move on with your life so you can become a better person,by staying with him,your just messing up your own life which you don't want. Simply tell him if he decides he doesn't want to qui any time soon,you guys' friendship is completely over,nor questions asked.