I am so sorry, but he said it to you. He said it all by telling you he likes it (cocaine) so much he doesn't want to quit using.
There you are. He was honest.. maybe for the first time in a long time.
Much wiser women with children have posted here before me.. listen to their words.
Time to detach.. no talking to him and change the subject if your parents try to talk to you about him... and it will get better. Love him in your heart and let him go.. cut him loose to live his life and make his choices even tho they are choices you wish with all your might he would not make.
I do care.