Please tell me whats wrong!

I don't know what to do
cause you will not let me help
how can i make you happy if you wont say what is wrong?

It hurts me so much to see you in pain,
wheres that crazy smile,
that brightens up my day?
wheres you dominating laugh?
and those stupid comments that you always HAVE to make!
as annoying as they are
they've become a part of me.
so having you like this,
its tearing me apart!

I want to talk to you but i don't know where to start.
It hurts me when you cannot smile,
and theres nothing i can do!
I feel so helpless! please tell me whats wrong.
don't shut out the world,
your making it worse.
and don't shut out your friends,
you cant imagine how much that hurts