"You"?

When u are thinking ,u will think of "You".
While u are driving , u will think of "You".
While u are sleeping , u will dream of "You".
When u are happy, u will think of "You".
When u are sad , u will want to be with "You".
When u have "You", u will smile.
When u are with "You" , u will laugh.
When u have problems , u wish "You" is here.

U will protect "You".
U will love "You".
U will be with "You".
U know when to play with "You".
U know when to hug "You".
But u don't know when "You" will go away from u.

What is "You" and who is "You"??
When will "You" come to your lifes and left u when "You" think so....