I've never understood people that yearn to be a kid again. When I was a kid, especially when I was in high school, I desperately wanted to get all that over with and become an adult. And when I became an adult, things were rough, but I felt so much better for so many reasons.
As I've aged, this sentiment has only been further reinforced by my experiences with aging. Not to toot my own horn, but I've been aging well and have gotten more attractive the older I get (so far). My social skills have improved so much, I was painfully awkward and unable to successfully socialize as a young person. Holy fuck, I actually have real friends and relationships now, it's amazing. Yeah I got responsibilities, but I can actually do things I want to so long as I stay within the confines of those responsibilities, definitely not something I had as a kid either. And honestly, I'm a much better person, which I won't get into too much, but I was closer to being right wing in my younger days.
Sure, it'll stop feeling so great at some point, but I'm kinda past the point where most people start to say getting old sucks and you know what, I say no, it's pretty cool actually.
My youth was a mixed bag. Good childhood despite being poor and living in a dogshit town. Major depression hit in my teens and thought about a dozen different ways to fuck everything up. Dropped out of highschool and moved to a different city. Worked a bunch of dead end jobs in my 20s and interacted with some awful people. Had some good experiences but a lot of bad ones too. My 30s have been significantly better.
I am privileged enough to still be able bodied but with a few aches and pains here and there along with some stomach issues like acid reflux and whatever else. I finally have enough money to survive and even thrive a little bit. Only part that's weird about aging is slowly not recognizing the person in the mirror and still expecting to see my 20 year old self looking back. The hair is getting thinner, the wrinkles are getting a little more noticeable. Being nearly 40 and seeing the world changing, and not really for the better in some ways, it's a lot to take in sometimes. I am definitely happier with who I am and wouldn't want to go back, though.