Thanks for your reply dear Ahmad!
I confess that life without love has no meaning!
We can see how much being in love changes someones even from outside !
He/she is happy , smiles all the time without any reason , works with joy , lives like a kid!:-))
What about inside?!
No word can truly explain the feeling of love inside of human!

My dearest Mahtab,
You are right … It’s very rare… falling in love can happen, but keeping this love in your heart is a nobel thing that stands for loyality and for the great desire for keeping this heavenly bond alive in our hearts… How can we live without love!! How our life looks like without love !! ... A moving body without a beating heart is a dead body… This reminds me with a saying of Oscar Wilde:
” Keep love in your heart. A life without it is like a sunless garden when the flowers are dead.”

And very rare!! :-\