Ghost in my world

How can I be such a ghost,
My reflection lost within the shadows,
Words cant be replaced in the back of my memories,
Scared of the world you've come to know,
The whispers in your voice,
Haunts me within the night,
As if I am trapped,
Between the girl I am and the ghost,
I can never let them know,
The ghost that haunts,
The ghost that is protected by my memory,
No grave to see,
No one to know but me,
My mothers sorrows buried within me,
His face to never see,
But His soul I know,
My mother grief torn,
Between the child she lost,
And the one she held,
He is my mothers ghost,
And I am his Mark on the world,
He is my brother,
Our protector.