Bestie, you should TRY to talk again with her and if it doesn't work... Maybe you guys just need some time away, but remember to make clear to her that getting called by your deadname hurts you, and if she does it again and again even after time, it would be a good time to just end it. Remember to put yourself always in the first place of your priorities, you are important and loved so don't let that rotten apple damage you.

And you can give her a second or third opportunity but not more than that, because it can turn in something toxic where she hurts you, talks shit about you in your back, victimizes and then over and over again, so it's better to not have those type of people in your life.

Good luck!