Got it. Your grandparents probably mean well and have good intentions - they don't want you unknowingly going down a similar path as your mom (which would arguably be worse, since they won't be around as long). That's not to say that your grandparents did right here. They still overreacted. Hopefully, you can explicitly show to them that you're going down a good path. That might honestly be things like introducing your boyfriend to your grandparents over a dinner.

If you don’t mind me asking, when did your mom’s drug abuse issues start? Was it around your age?