Your parents are wrong. You will never be too old for sleepovers with your besties. It is 4 am. I’m in bed right now with my bestie talking about Transformers. We were cackling a few minutes ago. We are 30 years old. Sleepovers will always be the bestest thing.
I’m 38 and I RP with my best friend, squee about Transformers with her, talk Steven Universe theories, and lots more. I also make plush dolls, and take my own plush dolls with me on trips. As my father likes to tell me: he’s never grown up, he just has to do adult things sometimes. And he’s in his 60s. It’s all relative. Do what you love to do and screw anyone who thinks that’s not being adult.
So much of what they tell you you will grow out of? It’s a choice. You get pressured out of it. Never let that happen.
The first thing I bought when I moved out and was settled? Was a nerf gun. Because I was told I was too old for toys and I’d always wanted one.
Most unhappy adults I know don’t have passions because they were told they got too old and it was unrealistic.
Literally DON’T LET YOUR DREAMS STAY DREAMS
My parents told me I was too old for toys, for kids shows, etc. But you can have those interests and be an adult. It’s okay to to be child-like. Hell, who makes children’s media?
Adults do.
So have your sleepovers, wear your cute pjs, chat with your bestie, have marathon movie nights, write fanfiction, draw fanart, play video games, enjoy things. You got one life. Live it the way you want and live it well.