Nothing anyone says will change anything, I have been trying to think of something.. I have been where you are, I know its one of the worst things in the world to deal with and go through.
Like someone has already said, There were other plans for your little man. He's an Angel. He will always be with you where ever you turn.
I know the range of emotions you are feeling..
Hold your little girl tight
I wish you and your family the best, And remember people are here for you