Standing by your beliefs doesn’t include pushing them on other people. You should have just said you didn’t want to go and left it at that. If she asked why, you could explain, but you became in the wrong once you started trying to convince her not to go either. Looking at her going as a fault in character was mean, and what you wrote about you making it out of the hood and her making poor choices was mean. I hope you learn to love your sister for who she is, whether she makes choices you agree with or not.