I am far from 16 but i feel more like 40, I know things no 15

I am far from 16 but i feel more like 40,
I know things no 15 yr old should know,
things i cant tell anybody,
Things only maby god would really get
Things like a faded red bathrobe can hide alot,
Things like if all you do is siton your bed counting ceiling holes, things around you will keep moving. Stuff will happen, even if you do nothing, your life will change.
Things like you cant save someone that doesnt want to be saved.
Things like this really make me wonder about forty, because what else is there to know?