Discussions

so... i recently found out someone i know has being doing cocaine. when i first found out, i was told it was "only once" and that the person was "in control" and wouldn't do it again.  
like a fool i believed.  
just recently i found out it had been a lot more than once, and this person had even driven me home as the DD, while on this drug.  
i told everyone i know that knows him. i feel bad for doing it. but i know, i know i did the right thing.  
thoughts?