Wow... I love this... I love how you compared her love to the different faces of the moon.. that's very interesting.
I loved the lines:
"The days turn into night, the sun into moon.
I know you loved and cared once and I know you still do."

and

"Promise me one thing and one thing only -
Never confess your love by the moon,
For it changes every night.
Your heart can be broken
By foolish but once sincere vows "

Beautiful words!