You don't need another human being to make your life complete, but let's be honest. Having your wounds kissed by someone who doesn't see them as disasters in your soul but cracks to put their live into is the most calming thing in the world.
Sometimes when you meet someone you just click. I'm not sure I believe in love at first sight, but I sure believe in the click. I don't think the click always mean the one you love, but maybe the best friend you ever had.