Allina - I see I already answered your dream in the posting section - Dear, his body is rather like a vehicle he used, a car, to gather experiences, and when he no longer needed it there was not harm to him in using spare parts.
The feelings you felt about him, the joy and comfort were real. And you should have no doubts about the fact he was with you and shared his presence.
Also it is not really sensible to grieve the loss, because he is now more fully with you than ever before. After death we are fully and always connected to those we love, and your grief is often a pain felt by those who have died Maybe that was why he was dressed is a light grey.
Please read
http://dreamhawk.com/dream-encyclopedia/near-death-experiences/ But also read Lynn Russell's book "The Wonder of You: What the Near Death Experience Tells You About Yourself". It gives so much information that will be a constant support to you.
I add that after death people grow and change and so any going simply means they are going through a change.
"All is a dance in the spiral of change. Does not every part of me intermingle with you? Do not my thoughts play at times in your own mind? And you, tell me, are not the strength of my hands and body at times your strength, your power to build and shape? You know my genitals as part of your own body isn't that so? We are always woven together in that way, touching each other, and so on and on into other lives till we see, if we stand back, the whole wonder of the tapestry".
Tony