i keep reminiscing about last time.
Is this a sign of growing old?
But i'm only 17. oh god three more years i'll be 20.
then another 20 i'm going to be forty.

What's in 20 years? It sounds really long.
But come to think of it, it isn't that long.
Unless you spend 20 years doing something you don't like or you're
stuck somewhere for 20 years without the people you love. Now that's long.