Some why's ...!

Some people look at me And smile
Some stare hard, harder But don’t smile
Some people just understand But don’t tell
But, some people look through me And ask why?
Why I feel sad, When I haven’t really lost anything?
Why I can’t sleep in the night, When there are no worries?
Why I never answer, When I always can?
I want to say, I want to answer
But, I just smile and say
,,
Some why’s have no replies