What if the dream was about death, but not a literal one, and instead a metaphorical one.
You talked about wasting your life in your blog. What if the mummy wasn't you, but rather your 'wasted life', being put away, and what you 'knew' to be your boyfriend, was instead your subconscious telling you to put away your wasted life, and move forward with the new one that you can bring about?
Brilliant, Chuck! It's up to Jeff to see if it feels like a good fit, of course, but this sounds really plausible to me.
As Chuck noted, Jeff has talked about dwelling a lot on his wasted life and proximity to death. And in the dream, Jeff isn't quite dead, because he can see through the strips of cloth/death as if viewing what remains of his life. His boyfriend's death is connected to Jeff's worries about his wasted life. He would have been an opportunity for a different kind of life, but he's no longer an option, which is why his back is turned.
Being not quite as much of a natural optimist as Chuck, I don't necessarily view it as Jeff's subconscious telling him to put his wasted life behind and move forward. I do see it as a reflection of how Jeff feels, though. He can see through the bandages because he can still glimpse the remainder of his life. And maybe the reason he can't see who's winding the cloth because the person winding the cloth is Jeff himself, cutting himself off from possibilities of a different life.
I don't know who the other people in the group would be, though. Are they just random strangers who also happen to be "dying"? Or are they connected to Jeff and the other elements in some way?
Sorry to dwell on death and be depressing, Jeff. But I do think Chuck's metaphor analysis seems to fit. If the dream were
Brokeback Mountain and Jeff was Ennis and the boyfriend was Jack, we'd certainly be discussing that possibility.