I've learned to live
With a heavy heart
And to play my part
And I've learned to live
With my fingers crossed
When all hope is lost
But how can you trust what you learned
When the person you love most
Isn't who you thought they were
You think you know someone
Like the moon knows the stars
Like the light and the dark
You know someone
Like the back of your mind
Like a moment in time
You think you know someone
Like you learned to love them
'Cause you think you know someone
'Til you don't
And I've fallen for
All your hopeless lies
I've fallen countless times
'Cause I thought I knew
That gleam in your eyes
When they looked in mine
But now I don't see you the same
'Cause the person I loved most
Looks at me a different way
You think you know someone
Like the moon knows the stars
Like the light and the dark
You know someone
Like the back of your mind
Like a moment in time
You know someone
Like the sun on your skin
Like the warmth from within
You think you know someone
Like you learned to love them
'Cause you think you know someone
'Til you don't
Yea you think you know someone
'Til you don't
