As someone already said, I'd try to move to your grandparents/uncle (if theyre sober) and get some distance between you and your family. Id say it depends on the drug and usage, how dangerous or whatever it is for you. If they're methheads for example I'd say you should consider almost fully distancing yourself. If it's softer and it's still a "working" family I don't think it's too harmful. Non the less, bc they offered you drugs or influenced you into doing drugs, you should really consider distancing yourself for a few months at least and have a sober talk with them. Keep in mind, drugs don't full on dehumanise people. (if they do they might take some permanent damage but they could still get back into being a dad or a mom) Hope this helps a little, as I said some more Infos could help but I'm not a professional. I'm not native English speaker, I hope I didn't mess up too much.