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.
The main thing to keep in mind is that she must be made to feel special. Be completely honest with your feelings and do not say 'I love you' if you do not mean it. Bottom line, the sweetest words you can say to a girl will make her feel special, beautiful, wanted and loved.