A former good friend now tells others that she hates me. I want to send her a short message in memory of our good friend for half a semester. What should I write?

"Hello, I don't know if you still regard me as your good friend, but I always think so. We are all students, reading and writing in the same classroom for half a semester. I regard you as someone I can talk to, and I hope our friendship will last forever. I don't know what I did to make you feel uncomfortable. Maybe we can come out and talk sometime. We've been together for a long time, and we need to know more than one thing, don't you think? I really need you as a friend. No matter what the result is, I really hope you are happy. "

This writing is just a template. I don't know about the situation between you and what feelings you really want to express, but as long as you really say it, I believe your "good friend" will not be too unreasonable.