Screwed up family

So my family for the past few months has really been struggling. My little sister starting hanging out with this girl who turned her emo (not trying to offend anyone!) and now she wears skinny jeans, tons of eyeliner, listens to emo music (which isnt half bad) and starting cutting herself.

Last yr. She was a srtaight ‘a’ studnet with lots of friends and she was kinda preppy I guess… Now she’s failing 2 classes and has cs in all her other classes. She is in 7th grade and has only 8th grade friends (which may be the problem) I’ve tried talking to her, but she won’t listen. Even my friends are concerned.

A few days ago she got in a argument with my dad over her grades. She staring yelling at him and telling him that she hated him and the family. My dad, my mom, my aunt, and I were in the room. She stormed off and so did my dad. 30 min. Later we noticed she wasnt in her room. She ran away. Luckily the police found her.

I just want my sister back. The sister I used to be able to talked to and joke around with. I’ve also had to hide this from everyone. My mom doesnt want to ruin her reputaiation. Some people make fun of her and she’s very sensitive. Everyone thinks our family is so close and I hate always pretending. I really need some advice. Shes going to a counselor now.. Btw. Sorry if this was really long.