How Do You...

How do you love somone when the one you love doesn't know you love him?
How do you love someone when the one you love only thinks of you as a friend?
How do you love someone whose love for you is different from your love for him?
How do you love someone whose heart
is in love with someone elses?
How do you love someone so much when in your heart you know he will never
love you back?