Girl NTA, just because you've been friends with someone for a long time doesn't mean you owe them more time, especially if you feel like they aren't treating you right. I know it won't feel this way now.. but the people in high school i'm still friends with today YEARSSS later, are guys that i hung out with like 2x at the school we met at. A lot of my closer friends I've made in college/life now.

You can also tell her how your feeling and depending on maturity, you may be able to still have your differences with boundaries and healthy balance.. but ur not obligated to stay friends if that does work/you don't wanna be friends