Prince William, Kate Middleton and Prince Harry
Kate Middleton and Prince William left Prince Harry feeling bitter and lonely after they did this. Pictured: Prince William, Middleton and Prince Harry during 'The Patron's Lunch' celebrations for The Queen's 90th birthday at The Mall on June 12, 2016 in London. Getty Images/Jeff Spicer

Kate Middleton and Prince William did something that made Prince Harry feel bitter and lonely.

The Duke and Duchess of Cambridge were very close to the Duke of Sussex prior to Meghan Markle’s arrival. The royal trio used to do a lot of things together but somehow Prince Harry was left feeling alone when Prince William and Middleton decided to leave Kensington Palace and move to Anmer Hall in Norfolk, their wedding present from Queen Elizabeth II.

According to Katie Nicholl in her 2017 book “Harry: Life, Loss and Love,” at the time Prince Harry felt that “he was losing everything.” He was living in Nottingham Cottage that his brother and sister-in-law used to occupy.

The royal biographer added that Prince Harry became very close to Middleton because the duchess helped him “fill some of the emotional voids in his life.” So when the couple decided to leave, Prince Harry felt “detached, lonely, rudderless.”

“Harry would often suffer really bad spells of loneliness. He was prone to bouts of feeling very low,” Nicholl wrote, adding that the Duke of Sussex felt that he lost his partners in crime, especially his big brother, Prince William.

“He was happy that his brother was married and had a family, of course, but he missed their friendship and at points he was very, very bitter about it,” Nicholl continued.

Prince Harry would reportedly say that Prince William got so boring when the future king was living the life that he wanted for himself. Markle’s husband was left on the shelf and hated being alone on Sunday nights.

Now that Prince Harry has his own family, he no longer relies on his brother and sister-in-law. In fact, they have grown apart.

Just recently, Daily Mail’s Ian Gallagher reported that Prince William and Prince Harry are splitting their shared household to ease the tension between them and their partners. The royal brothers are also set to have their separate communication teams.

Prior to the said report, Alice Scarsi, a journalist for Express, claimed months ago that the Duke of Cambridge and Duke of Sussex were considering a formal division due to their growing family and not due to the alleged tension between the fab four.