It sounds to me as if they didn't realise that people can deal with loss in quite different ways. Although in your situation I might not have been inclined to take Aslan's word as truth, even if it was a prophecy. They can be very unreliable.
That's interesting! Arthurian legends. He's usually a secondary character in our versions - they're ordinarily called the tales of Merlin, or Morgan, or Viviane of Avalon.
It really is remarkable that you are going to be marrying him, though. Do you not find that there are very many differences of culture between you? Camelot and London don't share many similarities.