How do we know

How do you know
"It will all be ok"
Something you told me
From the very first date
How do you know
The world wont end tomorrow
That we wont suffer
Hells unmentionable sorrow
How do I know
You wont walk away
Breaking what you told me
That very first day
How do I know
"It will all be ok"
I said it too
On out very first date