Why am I so childish?

I am a 23 year old guy, and I live my life a lot like a child. I play with toys, dress like a kid, watch lots of cartoons (even on toddler channels like Disney Junior), play video games, go to toy stores (I even work at one), chase the ice cream truck, pull jokes and pranks, and play on park playgrounds. The only “adult” things I do are work (currently at a toy store, but I hope to become a preschool/kindergarten teacher, or at least a classroom helper in the future) and take care of chores. Ironically, when I was a kid, I hated being a kid. I was the most mature kid in school, and I was in a big rush to grow up. It wasn’t until my freshman year in high school that I became so childish. It’s weird how everyone else my age has passed me up and is working on their careers and all while I’m “stuck in kindergarten.” Sorry, but I wouldn’t be able to stand having a more serious adult job, and don’t offer me a cup of coffee, because I hate coffee! Everything adult-related really bothers me. I have been judged several times for being this way, but my family thinks I’m awesome. Even the other kids/parents at the playgrounds seem to enjoy me there. I don’t know why I’m this way, but I don’t mind it at all, in fact, I love living this way, and I don’t want to change. I read online that many other people like this were abused as a children (which I actually was, but I’m not sure if that’s why I’m like this).