Start by saying goodbye and hope he is happy after you agreed to split.
Apologize if it was something you did which hurt hiDeep down however, they're hurting. Another telltale sign that he is hurt aft

I say goodbye to you with all my pain…. You were my reason for living and you will continue to be so for all eternity … I love you, I love you and I will love you forever. Goodbye forever my love; In