He's lost

My brother,
sitting right in front of me.
I've lost him.
I look at him
sitting next to her,
only looking at her,
talking to her.
I'm not the only one who' s lost him,
my parents, his friends.
But the most important one,
himself.
He lost himself.
And because of that,
he is losing us too.
My brother isn't my brother anymore.
He' s lost.