[¯|_(ツ)_|¯]

It's great that your sister stopped fighting with you once she heard what was going on. It sounds like even though the two of you do fight, she does care about you and doesn't want anything bad to happen to you. It's a good thing that you're having her tell your mom about your depression while you are at school, and hopefully that will help you out in the long run.

Getting drunk isn't all it's cracked up to be. You have to deal with the hangovers and how they make you feel (headaches, nausea, vomiting), the potential for alcohol poisoning, liver damage from long-term use, and getting to that level of drunk doesn't actually feel that fun. There's even a chance you won't remember things you have done while you're drunk, whether they're positive or negative. It's not "cool" to drink at thirteen, and if your friends are mentally draining or a bad influence on you, perhaps it's time to find new friends. Maybe join clubs, social groups, sports teams, or volunteer to meet other people who share interests with you and are a good influence.

I hope you're okay after collapsing! Get some rest.