Why don't people treat me like everybody else?

[noodles]

U need to stand up for urself. It sounds like u may also wanna reconsider ur friend choices if they don't invite u to places. Ur the last one on the list and it shoudlnt b that way. Try telling them u wanna be involved and included. Let them kno it hurts ur feelings and u don't feel like they're being good friends when they exclude you. Next time someone says ur immature or short just look a thtme and ask "compared to what??"
Don't let people or yourself compare maturity levels. Everyone matures differently so there sno real thing as immature or mature. Hope this helps! Srry if its too long