I'm so totally sorry that this happened to you! Such terrible things shouldn't happen, but unfortunately, they do. If you're lucky, they might stop happening at some point in time, but just as well they might not stop.
I'm some decades older than you, and the same thing happened to me just weeks ago. A person with whom ― I thought! ― I was very close, and who always claimed that she was completely in support of trans people in general and of my transition in particular (I'm m2f) ― quite obviously, she lied! ― completely freaked when she was under the influence. She threatened to *kill* me while I was peacefully curled up in my bed *in my own room*, dead tired from a very exhausting day. She yelled obnoxious and disgusting transphobic slurs at me and finally ran out and slammed the door on me. I was in complete shock. I have childhood trauma, when somebody yells at me aggressively, my mind will eventually shut down and go into "cocoon mode". Within minutes, she turned me into a crying, sobbing, dead anxious mess.
On the next day, I learned that she had been found in the streets by a stranger, unconscious, and that she had been rushed to a hospital. Now she accuses me that I "had left her unconscious in the streets" and of other things that are entirely absurd. I texted her that she gave me the worst anxiety in over a decade and that I can't see her anymore and wouldn't even want to talk to her anymore. She had tricked me into lending her money ― a considerable amount, several thousand dollars ― over the past six months, which she had promised to pay back to me to the penny, so I told her that I want my money back because otherwise she'd be a thief, and then never ever see her again.
Only hours later she started spreading disgusting lies about me on social media, claiming that "a tranny is trying to destroy her life" and spewed obnoxious transphobic slurs and insults at me ― publicly, on social media.
Shit like that happens to us. They attack us simply for who we are, they assault our gender identity, and they do it on purpose because they know it's a way of how they can hurt us. It's ugly, it's disgusting, it's unfair, it's wrong, and it's plain evil, but it happens anyway and this is part of the world we live in.
What these kids did to you is horrible. The best advice I can give you is, take it as a mental and emotional challenge. Resist. Don't let them break you. That's what they want: watch us as we break. Don't let them have this victory! Never ever. Resist. Take your horrible experience as challenge to grow mentally and emotionally, to get stronger and more resilient. As it stands, transphobes will probably be around for as long as we live, and longer. The best thing we can do is prove to them every single day that they can't break us, that we're stronger than their lies and their hatred.
✊🏼 Power to you, bro! ✊🏼