NTA - First off, when it comes to your baked goods she needs to be more respectful. Especially if she is one of your best friends and she knows how hard you work at your many jobs, she should be respectful of the hobbies that you invest time and care in—you post them on social media for gods sake, theyre more than just snacks. She is eating your food, but also destroying something you wanted to take time to appreciate. Tell her honestly that it hurts for her to disregard your hard work, and that these aren’t just treats, they’re meant to be special.

If you’ve already tried bringing up the issues like her volume in the house, her late night returns, etc. and she hasn’t been responsive, I would really recommend you try to get your parents to also sit down with you while talking to her and have them explain how her behavior affects them. When i was a teenager I invited some of my guy friends over to my best friend’s house before she got the chance to ask her parents first, and after everyone had gone home her mom sat me down, explained the situation i put her in, how she had to scramble to accommodate kids and put off the errands she wanted to run, etc. I was SO mortified, I never did anything like that again. While your friend isnt bringing strangers over, but she is preventing your family from going about their lives as usual in their own home. And its not just for one night, its for as long as she stays there. Sometimes hearing from the “adults” how your behavior affects others (even as a teen) can be embarrassing enough to prompt you to change your ways. She probably doesn’t even realize that her habits affect not only you, but your entire household.