carmaenforcer

Serious narcotic abuse has a lot of collateral damages attached to it. The people that love and or care for the user have to watch helplessly while the person they love jeopardize their health and risk loosing their lives.
I have lost a few friends and family (not dead yet, just lost) to meth. I myself am a functioning pot smoker and don't let it interfere with other aspects of my life.
Heroine, cocaine, methamphetamine, alcohol, tabacco, gambling have all been known to be relationship/family killers.
Don't feel bad if you've tried and have simply been let down, the fact that you do love this man is why you have to leave, because you can't watch him kill himself or throw his life away.
I'm sure you would not want to see him eat himself to a heart attack or blow his brains out with a gun either, the drugs are not so much the issue as the fact that he doesn't care enough about you or himself to stop or at least control his vise and not make it more important than his life with you.