AITA for sending emails through my school email?

I (13F) was fighting with a group of friends for a long time. It all started in early April, my friend "Skylar"(
13F) is a single child with rich parents, she is really entitled and gets whatever she wants, usually by whining. My now best friend, "Iris"(13F) was in my friend group with Skylar.

Together we were good friends until Iris and Skylar were fighting. It was something stupid that Iris said, but it wasn't that serious. We had a contract that stated that fights had to be resolved. Like every other time we have had a fight, the person not fighting would try to solve it.

I'm not the best person at that. I am very metaphorical and that is what ended our relationship. I came up to Skylar at her locker and told her "It would be hard to live with divorced friends." meaning that I would feel guilty if they were apart.

A few days later Iris and Skylar became close again, Skylar 3rd wheeling me. I noticed and Iris tried to help. That only made us farther apart.

One day she sat with our old friends that talked behind my back, saying I was ugly, I was a vomit mouth, I was white-trash, and I didn't belong on this Earth because I don't support abortion.

At this school, we don't believe in LGBTQ+ and Abortion because were Catholic. I don't mind LGBTQ+ but abortion is where I draw the line.

Iris was completely upset and it didn't take long to faze her out, but the looks that Skylar gave us really got under my skin.

Before long, one of our old friends, Kathy (13F), sent me an email saying I was a terrible friend for saying what I said. The thing was I didn't know what I did. The email went something like, "How dare you, Sophia told us everything and what you did is unacceptable. Manipulating people to be you friend is so bad, trust me I tried and look where I ended up." etc,.

Some background on Kathy. She moved away to England 4 years ago and just came back. She is a big tomboy and is very privledged.

Anyway, thhis caught me offgaurd so I opted to change this to our outlook emails other than our school emails. She refused.

More emails came through and I kept apologizing.

Than feild day came. We were paired up for a class right before feild day and Skylar was messing with Iris. Making Iris annoyed, Iris took the whiteboard that Skylar was annoying her with andslid it across the table and it accidently hit Skylar in the face.

Skylar ofc, overreacted and told all the teachers that Iris was a Psychopath and she laughed. But according to all the teachers I am the most truthful person they know and so I told them what I witnessed. I forwarded all the emails to the teachers for proof.

Kathy heard and started denying that she ever wrote those, yet theyproved her wrong.

May came and the emails didn't stop. I told the vice-principal, because my principal is not that good, and I got in trouble anyway.

Please respond truthfully. So, AITA?