I think you know the answer, that's what you were doing, Kain.

「Atem lets go of his hand, they are close enough to the coffin, just a couple of steps away that he believes the dragoon should take by himself.」

I lost my father too, when I was younger — I cannot remember any other pain greater than that, and, after all this time, I still don't know when we will be reunited again, but, I don't think he'd like the idea of me running away from him in fear. If you have accepted it, then tell him you're fine.