Yes, we all think about death, but at 7 or 8 years old it should not be a main focus.
Exactly. It's a preoccupation that sometimes interferes with his daily life. It's a matter of degree, I guess. I'm not sure I was even aware of death at age 8.
Thankfully he does not have any problems with his peers, he has friends and gets along well, but I fear he's got a rough road ahead of him. He's VERY sensitive, and cries at the least provocation, just look at him sideways.
Our son has some friends, but continues to be oblivious to their cues. He is so focused on whatever is in his head that he cannot see what others are doing, or that they are not interested in what he is talking about.
His big thing right now is Legos. He's consumed by them. He talks about them, worries about them, wonders what will happen if they're all gone when he's saved his money, etc. It's great that he has imaginative play and patience for building, but it's to the exclusion of other things, and other topics of conversation.