I believe... that it exists and i doesn't... ^^U
It exists because sometimes you happen to have the luck to meet somenone and just BANG! feel somthing running all over you and feel sonthing that tells you that that is the person you want to share the rest of your life with...
But I also believe that a good relationship, and those that are meant to last, are based in knowledge, confidence, trust and a good friendship. You have to be friends with your partner before he/she becomes your couple... Love is friendships woderful next step ^^
So... maybe you met someone and BANG! felt the love... but meet him/her better before you go all mushy xD