how do I cut a friend off

I have had my fair share of friendship breakups but i seriously don't know what to do now bc idt we were that close.

So basically I met this girl in 11th grade who was insanely cool in my eyes. I was already friends with her friend and we basically became a trio by the start of 12th grade.

At that point of time I started noticing her personality which I didn't really fw. She used to judge people based on how they look A LOT. Like straight up insulting them. She also was really bratty and wanted people to know that she's rich. I don't know if it was deliberate or not but sometimes she used to "joke" about some really personal things.

By the end I didn't really wanna talk to her so I just started putting some distance between us.

School ended. She wanted to hangout with us 3 but i didn't wanna go out and for some reason we could always find a reason to.

I stopped responding in our group. But now after like months she texted hiii and idk if I should respond to get closure or not 😭😭

Like do I just straight up tell her she used to piss me off or not. I want to know what I should do y'all help me.

I forgot to mention this but I didn't wanna cut her off while we were in school bc I didn't want the other girl to get stuck in between us and I would just tell myself it's a few more months anyways and just ignore wtv she did. I feel like I am bad on my part too but I still dk man it's just weird.