Hopeless for my bff

So me and my bestfriend have known each other since first grade and we grew up with each other. I moved to NY, away from my bff, and I found out her mom was taking drugs that made her basically go nuts and abuse my bff. Her mother has slapped her and neglects her daily. She has even tried driving under the influnence with her in the car. Once I went to visit and her mother was yelling at Jaden for no reason and then tried to drive us to NY under the influence. When she was sobbered up she drived me home to NY but she went to my bathroom and did some form of drug (all I know is that she left a white powder in the sink that smelt chemically that my animals could've easily gotten into) and she acted like she actually lost her mind. My mom forced her to spend the night because she couldnt let her go driving with my bff back to Delaware. I still live in NY and her mom is even worse. She spent all the money for my bff's school supplies and stuff just for drugs. She disappears every other weekend leaving her with her father to PA (they live in Delaware) to buy more drugs. Her mother even tries to get her high too! I feel so hopeless for I her because I have never dealt with this stuff before (Im 14 and my bff is 14 and a half) and I cant call CPS because Im the only one who knows this first hand and she'll hate me forever and she'll be taken away and Im scared she and her autistic brother will end up some place worse but I dont want her to end up going down the same path her mom is going down. Help! Her dad isnt even trying to help her.