Dead to me

I remember the day you left
I'll never forget that day
I never got used to when you were gone
I only wish you could stay
But I know you never would
For all this time
You have never left my mind
I hope you're happy
Wherever you are
Whoever you're with
But I don't know you anymore
You aren't the person I knew
Though your heart still beats
You are always dead to me