How to Find "The One"?

"Love is passion, obsession, someone you can't live without. If you don't start with that, what are you going to end up with? Fall head over heels. I say find someone you can love like crazy and who'll love you the same way back. And how do you find him? Forget your head and listen to your heart."

William Parrish

Have you ever fallen head over heels? How did you find him or her? Do you think "listening to our heart" is sound or sappy advice? Do you believe in "the one"?