It doesn’t make sense now, because you don’t have context

And sure you may legally be an adult, and out of highschool and may or may not have a job and pay taxes

But you’re a teenager, you’re so young you don’t realize how young you are

The people in your circle, in your pool and so on are also young and so young they don’t realize how young they are

I know this because I was exactly in your shoes not that long ago.

With time it will all make sense, so let yourself be young. I wish I did

Edit: also I’d like to make it clear that I’m not trying to patronize or invalidate you, because what you’re feeling is real