What is the sweetest paragraph you can say to your girlfiend?
I don't fear spiders or snakes.
At great heights, I jump off smiling.
In the face of death I laugh.
But, when I look into your eyes, I find myself in great fear of just how much in love with you I am.
Of course what you say is less important than how you say it, and how much you mean it.
Tell her that you love her, with feeling and she'll know that it's true.