My ds started junior school today only to be told during his year group assembly that one of his best friends died last week. His friend was diagnosed with cancer while they were in reception, so ds was well aware that his friend was 'poorly'. DS always looked forward to the day when his friend would be able to come back to school and play with him and the others.
It broke my heart when ds asked "How can I go to play at 'friends' house now he's dead?"