Me and my friends relationship has become toxic and I need advice on what to do

Me(18 nb) and my friend Alex(19f) have been friends for 3 years . At the start of our friendship everything was good and dandy but the last year of friendship has been kinda rough.

I don’t know where to start so I’ll start with a specific scenario that happened.

So January through March me and Alex didn’t hang out once. Every time we had plans she canceled cause she “ had work” or “was too socially drained” to hang out but then would post with other friends.

Then in March she texted me out of the blue telling me she wanted to hang out. She told me to come over at 6. For context I have sever social anxiety and need to be told if there’s is gonna be people there when I hang out with someone. My friend knows this and we have had multiple conversations about this. When I got there she said it was her friends birthday and her car wasn’t big enough so I had to drive. We went and picked up 5 other people which overwhelmed me so much. I drove them around to thrift stores and my friend ignored me all night. Every time I tried to talk to her she would look away and act like she didn’t hear me. And the one time she looked at me and said you’re not apart of this friend group so just be quiet and go away. When we finished thrifting we went and got pizza. My friend said she didn’t have enough for pop and asked me to buy some 2 liters. It was only 5 bucks so I said yes. When we got back to her house she sent everyone else inside and told me to stay back. She said they were gonna do gifts and since I wasn’t apart of the friend group I should just leave. Then she got out of the car and took my fucking 2 litters. When I tried to talk to her about this she said she was just going through a lot.

After that I decided I needed a little break from our friendship and sort of ghosted her. She didn’t really realize. Then in May we started to hang out again and everything seemed to be fine.

But in June she started to get mad at me whenever I hung out with people who weren’t her. It was like I wasn’t allowed to have other friends. She also started canceling and then hanging out with other people again and this really hurt me. When I tried to talk to her about it and told her how her anger was hurting me she said she was “just grumpy”.

Also in July my gramps passed away. Three days later we were hanging out and she asked if I wanted to talk about it. When I was finished sobbing she looked at me and in the most snob voice said ya well I’ve lost all four of my grandparents.

Now for the more broad stuff. I’m just gonna put bullet points cause idk how else to write this.

• she called me autistic all the time. Specifically when I was socially awkward because of my social anxiety.

• she would yell at me and get mad at me for being me. For example I struggle texting people. Like to the point where I have had panick attacks thinking about texting someone. And she would yell at me because it took me to long to text her back.

• whenever I would vent to her she would try and one up me and our trauma me

Anyways it got to the point I would dread when we had plans and would pray she would cancel. She felt like a safe space at the beginning of our friendship and by the end she was no longer a safe space.I talked to her about it but she just told me I was overreacting and that she doesn’t think she did anything wrong. What should I do?