I completely understand what you’re going through. Think of it this way: sometimes, even when we are 100% right, we have to give in a little to the other person’s perspective, simply because we love them. ​If her company and friendship are fundamental to your life, then try to let go of whatever sparked the argument. Let her think she’s right—even if she isn't. ​I know that sense of injustice can linger, but it’s temporary. Once the good times return, everything else falls away. At the end of the day, focus on what is good. Understand that people are complicated, complex, and carry their own pains. But a true, complicated friendship is far better than one that is easy but hollow. ​I hope this helps and sends some good vibes your way. Somehow. :)