being excluded from group activities as an adult…

… just feels sooo… conflicting? can’t help but feeling hurt but at the same time it feels immature to be upset.

not sure if i upset someone, or they just forgot to include me, but my friends got together and had thanksgiving. didn’t know about it until i opened my social media to a bunch of people posting. it’s not even like it was a couple people im not the closest to, it was quite literally everyone but me, and another friend of mine who i found out was invited but was busy. literally a group of over 15 people.

someone let it slip they have been hanging out and doing activities with each other as well, she just assumed i just could never make it, turns out there’s a new group chat im not in.

i want to ask about it but i feel like it’s impolite to invite myself especially if there is a problem. we are 22-30 but im worried someone will take it wrong if i ask about it or imply interest