Why are girls so mean?


Im a female and currently in high school. Im currently having issues with a girl in my class, and I’m not really sure why. I've never met this girl, had classes with her prior, or even know her name. Yet she’s called me names, and said humiliating things towards me for no reason. She referred to me as “that girl that looks like she's (r word)” to her friends after I graded her test. And today I was going to grab a book from the front of the class, and she was walking the opposite direction I was walking in. And she said “um anyways!” Really loud. It honestly makes my blood boil, and I want to say something. But I don’t want to give her the satisfaction of knowing she’s bothering me. I seriously do not understand why some people are like this, I try to be kind to everyone regardless of the way they look, who they are, or any factors. Even people who have been horrible to me I am kind to.
Why are girls so mean?
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