Prince William
Prince William attends the unveiling of The Victoria Cross Commemorative Paving Stones representing each of Birmingham's 1st World War recepients at the Hall of Memory, Centenary Square on Dec. 7, 2015 in Birmingham, England. Getty Images/Richard Stonehouse

Being a member of the royal family is never easy, but Prince William felt especially stressed because of what his future holds. As second in the line of succession, William will most likely become the king of England some day.

Despite his bright future, the Duke of Cambridge confided in former Prime Minister Tony Blair about his concerns of becoming king and how the royal spotlight ruined Princess Diana’s life.

In Blair’s 2010 autobiography, “A Journey,” he appeared to betray Prince William by sharing details about their private conversation. Throughout the time in which Blair served as the Prime Minister, he was invited to stay at Queen Elizabeth’s Balmoral estate on several occasions.

During one of his visits, William approached Blair, and the two had an honest conversation. “He knew now, if he didn’t before, what being a Prince and a King meant,” the former politician wrote.

“For all the sense of duty, the prison walls of hereditary tradition must have seemed too high a price to pay.”

Blair revealed that William was particularly upset about the way he wasn’t allowed to have privacy following the death of his mother in 1997. “I had also spoken to William, who was not only still grieving, but angry,” he wrote.

“He knew, rationally, why the week between Diana’s death and the funeral had to be as it had been. But he felt acutely the conflict between public position and private emotion.”

Although the conversation allowed Prince William the opportunity to share his burdens with someone, he was unhappy when he learned Blair betrayed his trust by using his feelings as material for his book.

Following the release of Blair’s work, the Daily Star claimed William was livid. “William would have thought that any conversation with a Prime Minister would be confidential,” a palace aide said at the time.

Despite Blair’s claims that Prince William has had doubts about his future as king, the Duke of Cambridge has continued to put on a brave face as he takes on more royal duties and prepares for the day that he will ascend the British throne.