I'm not afraid of getting older.
It happens to everyone. Age, rot, weathering. The point when your bones get soft and start to buckle and the cartilage in your joints wears away, and you shrivel into an old person. It happens to everyone.
I'm afraid of being young.
Youth is a cruel time. A time of no agency, of being pulled along in a current too powerful for you to learn to swim. When the word seems most interested in you, watching like a hungry beast for your weakest moment so it can pounce.
I'm afraid of seeing youth play out again.
Any parents experiences youth at least twice. Once yourself, and then again for your child and any other children you may have. And if you did not learn to swim, but just barely kept your head above water, you dread seeing your child do the same. You lose hair as their birthdays approach, as their dance recitals come, as their graduations pass, and you dread they do as bad as your worst memory. You'll be there, but gods it hurts because you see yourself next to them and you remember every horrible moment. And maybe you'll spare them your mistakes, but you know they'll make their own. And that stings just as much.