L.O.V.E - What, when, who, why, how

What is LOVE? When do you fall in LOVE? Who do you fall in LOVE with? Why do you fall in LOVE? How do you fall in LOVE? I've been thinking about serious relationship with someone lately and I found myself unanswered with the LOVE I had. Is this for real? Being single does not mean you do not need LOVE. But why LOVE hurts? I guess many know the answer... LOVE is fragile...