i need advice for problems with 2 of my friends (1/2)

hi ik this is mangago,,, a yaoi manga site with some questionable cults and people but im really stuck and have no one to ask </3 i feel like some of you guys may be more experinced with this :DD also, i feel as if this post will become to much if i ask everything at once so i made 2 diffrent post iucfhwn-

i have an online friends and irl friend. (ive been friends with the online one for 3 years through an art commisson, the irl one for my 8th grade)

so ill start with the irl one,
after the summer break she stopped talking to me, and for like, 4 months i tried messaging her untill a few days before my birthday we had a nice, long talk.i kept asking her what was wrong and she just said that she doesnt want to be friends with me anymore. i dicedide that it was becuase we now go to diffrent high schools and stuff?? so i was like yeah yeah okay have a nice life but she started throwing shade at me like wth- so long story short i asked her and she kept telling me i never payed attention to her and she didnt feel vaslid, or even like she was a friends to me. i honestly thought she was my best friend :( i used to go to study sessions to help get good grades and revise our work, and we even went out sometimes. we used to hang out all the time in school i dont understand what to do, am i in the wrong? idont think i did something wrong, but i also really like her as a person, we have argued once in the past for a simmalier thing.

*sorry for spelling mistakes