invisible onlooker

Don't cry, I'll always be here.
When things see something mean and scary.
I will make it go away.
Even when you tell everyone to 'leave you alone'.
I will still be here as you cry.
Forever by your side.

I have always been here from your birth.
I will always be here till your death.
Although you can't see me I'm here.
And I will be watching over you till your time.