What is a creative way to write (and give) a secret admirer's note?

Definatley write your own letter for one, don't give a printed card with a note already in it. Stick it in their locker, and tell her DON'T tell a friend to give it to him or he'll definatley find out. Plus tell her not to hide from him, or he will know. Just be romantic and not suspicious, thats all!