A close, close friend of mine lives around the corner from you...your boy and his boy were/are friends.
I've cried with my friend today as we both felt a small, small piece of the pain.
As someone who has tragically lost someone as well....I can only add this...
The Veil is so much thinner than any of us can comprehend. Your son will be on your right hand and on your left. He will guide you, your wife and his siblings always. I know these things to be true b/c I have had the experiences that have testified of that. Our Heavenly Father will not leave you alone. We don't know each other, but I pray you will quickly know how thin that veil is.
God Bless my friend.