Missing someone...

Why is it that to gain something you always have to sacrifice something in it's place!?
Why doesn't happiness come in a separate package and not in combination with sorrows...?
Why people whom you love are bound to go away from you, though sometimes for a while but still this while seems longer enough! Theory of relativity... Indeed...
But still, missing someone is worst! Not a useful thing into itself. Coz most of the time they doesn't even know that somebody's missing them so badly. Though same goes when we are being missed, we never know who is missing us and at what intensity?!
May be this is how it is ment to be... You miss someone, someone miss you... Sometimes you meet sometimes you never, but the feelings remains same forever...