Can I ask my girlfriend to not drink or do drugs? I care about her and I want to make sure she doesn't make any bad decisions.
Are you mad at her for drinking? Are you mad at her for doing drugs?
It's both. I care for her and don't want her getting hurt.
You are doing the right thing for her. Her attitude is of someone that's in denial. Keep at it with her and she'll eventually get it.
It's not going to be easy.
Since she is doing illegal drugs while drinking, it is kind of your duty to help her get off of this kick. That's very deadly and if you love her then you'll try your hardest to remind her of that love so she is willing to put this danger behind her.