pls help! i feel so guilty even tho idt ive done anything

hii ive made a post very similar to this - though i cant find it lol its a bit lost in my notifications
to sum up
- my friend an i had an arguement over something she had promised me for the past two years about us two going prom tg and getting ready tg etc ( this may not sound that deep but it ws explained in my old post and it was quite hurtful ), and then decided to second option me very badly. she neglected me at school and has just been not the very " best friend "
pineapple ( my friend ) sent me a long message where she said shed noticed things had not been good between us - i was lowk happy when i received this message, however..
- she began by blaming me for not talking to her ( i understand this to some extent . i should have talked to her but i hadnt had an opportunity, as well as this i didnt want to bring it up as she seemed happy to go to prom with the other girl, so i wasn't looking to interfere with her excitement )
- she also said she expected to wish me for her exam - again, she has never bothered to remember any of the exams i take unless i bring it up myself. ive simply had sm on my mind which i had explained to her and id forgotten
- then she made ME apologise for the way id been acting ( because of her btw lol ) even though she never gave me a sincere apology for how she had been treating me.
she said it was "hard to pick " between me and the other girl who asked her to go prom w her. but somehow she still second optioned me, and according to her she had planned going w this girl since primary but never once did she mention this to me since the last two years. i udnerstand her wanting to go w her primary skl friend but im left on my own at the vert last minute
she said that she doesnt know what to talk to me abt but surely if we were "bsfs" she could easily tlk to me ?? idk.. weve been friend for 5 yrs, and suddenly shes talking as if its such a big struggle for her to talk to me..
midway conversation, she said " she couldn't do this anymore" and said she was goign tot alk to me abt this next week.
i dont understand this - se brought up the convo herself, and then decided to no longer prticipate??
i dont get it honestly, the way i apologised it made me seem as if id done the wrong thign - thoguh she has been the reason my mental health has been so bad the past four weeks]
what do i do?? she hasn't even replied to the messages i sent to her trying to console her bc she said " she was going to go cry" and how she hasnt been able to focus the past week ebcause of me, but my mental health is at the lowest bc of her and not once did i complain??
pls help!

Hi boy or girl or whoever, not experienced this myself but u got to calm down, its not ur fault she was a bit of a bitc (don't want to get flagged). Friends come and go u will find a new best friend who is loyal and actually cares for u don't let this affect ur exams (GCSE, A levels whatever) cause that is gonna calm u in the long run cause without good grade no good uni no good job you see the path this is going in so don't be used about something that is short term if it will affect u in the long term. You got this, keep a cool mind tell me if u got any problems, and if ur a boy girl, bi or whatever. Also tell me if ur a gcse or a level student pls cause it will help me talk so stay relaxed and reply.

lol im a girl im doing gcses lol

what's ur name btw

U all good today ?

hii help im rlly sorry im not rlly comfy sharing tht here hence the anonymous post lol

k fairs that is up to you, I respect that choice, yh im fine as well thanks for asking I got end of years coming up so bit stressed about that but it will prob go well Abu anything interesting in life

u know today I got catfished, then I realised it and told them to screw themselves, cant believe I fell for it waste of 20 minutes, im kinda mad what should I do