AITA for telling people who hang with my ex friend what she did to me?

I 19F and she 20F were became friends prom for my junior year and her senior year. It wasn’t till her 19th birthday that we started having first issues. I was still in high school, and her 19th birthday she decided to go use her fake for the bar. After that, she slowly stopped reaching out. We would party a lot and she stopped inviting me. We didn’t like fight each other or anything but she basically ghosted me, not going to my birthday which is in May and hers in April, or my graduation.

I moved on from it. Went to college. Second semester started, When she started reaching out again saying she ghosted a lot of people and feel bad. I started to drive 3 hours home from college on weekends to party with her as also had my fake now. Even got a talking stage in her friend group that unfortunately ended around same time as her.

I thought all was good. Even spent 300 bucks on her birthday, as I’m a big believer of birthdays which why I went out last year too. She promised this year she would be there for mine as well. but college ended and expected now that I’m back full time they would hang with me, and they didn’t. They stop inviting me out and even for my birthday the group was like “I guess you could come but you can’t be apart of our group to get us in trouble” when they know I have no one else to hang as I don’t live there full time. My birthday came, nobody confirmed, I went out with my sister where I saw them all there. Went up to her drunk, saying her friend basically said that I was a bother on my birthday which is what the text sounded to me. She stormed off, got calls and text of them saying they would beat me up. I was done with this because not only did I went out for her birthday, drove most weekends for her, she is now trying to get me jumped on my birthday. Her friend group and the talking stage stop talking to me to. Had no one.

Now I’m starting to go out with anyone who will accept me. A lot of people know my ex friend though, as they are always at the bar. I usually like to sit back as I feel bad. Even though I literally asked someone if I should apologize (I don’t know what I would apologize for but figured it would help) the girl told me “girl she called me last week saying you need to be in the mental hospital and you telling me you want to apologize to her for talking about how she tried to jump you?” But I just personally don’t run that way.

Now sometimes I get drunk and mess up and start talking about her. Next morning I’m getting texts saying I’m starting up old shit (happened only two months ago with a 2 year long friendship) and how I’m spreading rumors.

I just don’t know if I’m the asshole in this as maybe I should even stop bringing her up. And maybe the way I went about it was wrong as maybe the message about my birthday was misunderstood and I started shit for nothing.