It is possible that after meeting someone for the very first time that the attraction is so great that we decide that we just want to be with that person for the rest of our lives.....................but we seldom base our love on sight alone.
I'm of the opinion that love at first sight isn't possible..................but what is possible is that a physical attraction can occur immediately or as we sometimes say............at first sight. This leads us to meet and chat-up the person we are attracted (physically) to and then the personality might click in and we find we start to fall in love with the person.
Generally the best relationships are the ones which grow and grow and mature over time. In the quick falling in love ones the participants usually find after a while that they haven't as much in common as they first thought.
Old sayings are usually based in old wisdom...................... "Marry in haste repent at leisure"