I was very sorry to read of your loss. I thought about losing my wife, and I could feel the tears begin to well.
Last August, my mother died at the age of 53, leaving her husband of thirty-two years, her four children, and her first grandchild, who was still in the womb. I've been with my dad through this, and I can imagine how much pain you're in.
Remember that your wife loved you with all her heart, and that she would want you to be happy. With time, you will slowly have fewer bad days, and more good ones. Give yourself permission to smile and laugh, knowing that it is what she would have wanted.
My brother is now 16. He was 15 when our mom died. He and I have talked at length about our loss. I don't know if it would help, but I'm here if either you or your son want to talk to someone with a sympathetic ear.
Hang in there.