Nope, I don't believe in it.
I do, however, believe in "lust at first sight" - because all this heart-racing, sweaty palm, nervous stuff that goes on when you see someone really attractive isn't love. It's just your body's hormones reacting to something it finds attractive as a potential mate. It's lust.
Just like having a crush on a celebrity. It does't mean you "love" them.
Because I don't believe that you can love someone you don't have the guts to actually talk to or look in the eye. How can you get to know that person? How do you know they aren't a total jerk? How can you possibly form a connection with that person?
You can't. So simply put...you're not in love.