Hiya C.C.F

Be careful of your self, all heroin addicts thought that they could keep their heroin use under control at one stage, but the pull of heroin is an uncontrollably strong one.
I was using daily for more then 2 years before i admitted to myself that i was addicted, & since then my whole world has centered around getting & using heroin.......
I love it

But i hate it
But every single heroin addicted started using gear as a bit of fun, no one ever plans to get a habit, so look after your self & stay safe.
& fair play to you for looking after your mate, hopefully he'll listen to you, 24 is such a young age, he is lucky to have you watching out for him.