I don't believe in love at first sight.
I think that we choose who we love and if two people meet and mutually decide at first glance to love each other, then & only then is it love at first sight.
Love is not something that we fall into, I used to think so when i was younger, but now I know love is a conscious effort. Loving someone through sickness, job losses, moodiness, irritability, and all the other things being in love can put you through is a choice that often requires diligent effort and committment.