Sorry to dig this out, but I'm just now coming across it after being out of town for the weekend. What can one really say? The thread is aptly titled, "Most tragic news ever". I'll only try to offer my condolences. You'll have to find your own way out of your grief, but I know everyone here will help you along the way.
Now I'm not religous, but I do feel that death is only another part of the journey. When I look out my window I see the stars and infinite space. I look out my other window, and see trees...yet I know beyond those trees there is the horizon, and then the stars and infinity still. Thus, being surrounded we are truly in the center of the universe all the time; there is no true here or there. The same is true for time. I see being alive as merely our awareness focused into bodies and minds on a particular point, while the spirit is in eternity, in that it is both intangible and timeless. Your son is gone, but his spirit remains.