I sacrifice myself

I miss us,
I miss you and I,
but you've moved on,
and I'm left here to die.

What do you see in her,
that you never saw in me?
why can't we go back,
go back to when there was "we"

when you left,
my world was shaking,
but you couldn't see,
my heart was breaking.

my life is black,
everything is colder,
and every single day,
it seems I get much older.

but I want your happiness,
more than anything else,
so once again, it seems,
I sacrifice myself.