Hello! @brittle juniper 👋, I see what you're are going through right now and I must say that's rough news :( But let me give you the best advice and motivation I have gathered to keep me going through my toughest days.
Let me say first of all that I totally get not talking, I personally have had autism my entire life, verbal talking wasn't even a thing to me until 5th grade, and yes people had been thinking I was mean too because I never talked, the thing with people is that some just can't accept the way a human being is, and judge people based on their outward appearance instead of trying to get to know the person for who they really are.
I would really suggest talking to an adult/teacher or maybe the person who assumes you are 'mean' Talking things out with a person can defiantly help with the problem and let the other person know your personal situation.
Lastly and this is important Please do not think of ||self-harm|| I really do understand your situation and how you might feel, but I assure you ||suicide|| Is never an option you should think of, Life is full of problems, but getting through them will show you a world of opportunity and love that you would be missing out on ❤️ We all are humans and that is what makes us miracles.
I really do hope you read this and take my advice, I think you are a wonderful person that has just been misunderstood ❤️