Sir Elton John has admitted that he once “burst into tears” when he made a stark realisation about a massive change in his family. In a heartfelt admission, the ‘Rocket Man’ singer, 78, opened up about a touching moment involving his 14-year-old son, Zachary, who attends a prestigious public school in England.

Yet, when it came to waving his son off to boarding school, Sir Elton, who shares another son, Elijah, 12, with his husband, David Furnish, was left rather upset by the experience.

Sir…