Existence of Love?

Love exists as long as you are not questioning whether it exists or not. Once you start wondering if you love someone...it is gone.

Etiquette of Online Dating

So I was just thinking...what kind of rules does one follow in the realm of online dating? Is it like the real world? Do you date one person at a time or are you constantly on the lookout and "dating" until you find someone you feel relatively sure about? Do you have options? Are there any "meant to be"s?
Is there even any kind of etiquette? Have we left any kind of courtship all together now that we've moved this to the online world?