CC, I just want to say welcome. You have landed among some very good people. I think telling your counselor is a good idea. You seem to have a good head on your shoulders, and a good heart.
I was the mother who used, and unfortunately have two adult daughters of whom one is an alcoholic, and the other an addict. That is something I will carry the rest of my life.
Please know you are an incredible young lady, and please keep us updated. Warm hugs from Kansas!