I would change your storyline and react differently to her. Assume there is a lesson she is trying to convey about learning how to deal with difficult people and you only have until the end of the semester to figure it out. Being offended or feeling insulted is a chosen response. You’ll deal with lots of difficult people through life and some of those relationships don’t end based on the calendar. You may conclude that she is just a genuinely unpleasant person, but at least you will have done your best to navigate a challeging situation.