I got left out again

I've always had problems making friends cuz of my social anxiety and the last time i had a close irlfriend was probably in 6th grade (im in 11th now for reference). So right now im in kind of a "friend group, " I don't really have any close friends (i have one friend but they live a little too far away) there or at all. So like theres ppl in the group who are close to each other and everything but im not close with any of them. I was recently was like starting to be happy that I have friends that actually hang out with me and stuff cuz I eat lunch with them and stuff. Though I dont see them much throughout the day since i have no classes with them. Turns out my friends (everyone in the group minus me) all hung out 😊. I saw them post some stuff but I didnt know what was happening or that all of them went. Then like at 9pm one of my friends msgs me and asks if i even got invited. I didn't. Everyone else did, I guess im just not as close with them as i thought even thought. Its alright tho cuz I get left out a lot but yk it feels bad and I dont want to cry but I am crying.