So some backstory - DS is 15, will be 16 in January. We have only had him a year, he is adopted. Previous to living with us he smoked pot, drank, ran around with a horrible crowd. He stopped smoking pot about 5 months before we got him, and quit drinking before then. However, even though his bio family is full of alcoholics, he still doesn't think drinking is as bad as smoking pot.
A couple months ago he told us (with some prodding, we granted immunity if he told us) that he had smoked pot once with a girl to try to impress her. He said he knew it was wrong and that he wasn't going to do it again. He hasn't hung out with that girl again (it was a one time only thing).
Today he hinted around that there was something else he wasn't telling me. He said it was 2 months ago. I'm pretty sure, based on his nonverbals when I questioned it, that it's drinking. I don't think he got drunk persay, but I do think he drank. He will not come out and say it this time, he said that he would be in big trouble, but that it's not as bad as "smoking" or "having sex without a condom", which is something we have drilled into him.
I don't really know what to do. DH and I don't drink because we don't want to do it in front of him. We always talk about how at risk he is for alcoholism, and it's even been broached in counseling. I have stated over and over how I want better for him.
DH and I have just told him that we trust that he will make the right decision and that we want better for him than what his bio family had. What else do we do?