My hidden label

Want to hear a secret,
my warning label is it.
Hidden so no one can see the secret,
my warning label is it.
Don't look,
I'll tell you.
Warning,
she's broken and you can't see it.
My secret,
promise you will keep it.
Hidden so others can't see the secret.
my warning label was it.
I hear that I'm broken,
I feel it,
don't look at me differently.
You promised you'd keep it,
so keep it safe.
It's behind the warning label,
She's smart and defensive.