your question is so vast to explain but for me as i heard from them "love can't find no reason."
co'z if s/he will find a reason to love you how if that the reason why s/he loves you can't find her/him from you? what do you think? perhaps it only leave you pain.
i just want to share this movie "50 first date!" try to watch this one. i love this and you gonna love it too. For me the lesson or the theme are "when your love lost his/her memory are you willing to know her/him once again? actually its very fresh for me because i had watched it an hour ago.",)
another "love is in the air!" love begins from small things to bigger one.