Leave it all behind

Here we go
Closer to the end
Let me know
I'll be your only friend
Things you thought you understood
Are all the things I lack
So sorry

And I'd leave it all behind
With no regard for what I'll find
In time you'll see
That you can't breathe without me
Life and times go by

Well I know nothing is okay
Will it show if I try to numb the pain?
Things you thought you understood
Are all the things I'm not
So sorry
And so afraid