Sorry probably isnt enough, at least not to me.

I can't believe i let you down. Of all people, I should have known. And as you found yourself falling, i wished i could have been there, i should have been there standing by you. I cannot ask to be forgiven, but i pray that i can make it up to you someway, if you let me be there for you.
You mean more to us than you may think.

Happy Birthday.