Hello bradychi, Welcome!
It can all seem to spiral so far out of control in such a hurry with addiction. Please believe that none of what you did is mean or heartless. Plus, it doesn't matter what his friends and family think, you know the truth, and they will find it out soon enough at the pace he is going.
Please make yourself at home here. You'll find this is a wonderful and supportive place.
Welcome, again!