Princess Diana’s tragic death greatly impacted the lives of her two sons, Prince Harry and Prince William, and her upcoming birthday might not help the brothers end their yearslong feud. “Harry was scarred by what his mother went through, and when he saw the same thing happening to Meghan, he knew he must act,” a source told an outlet, referring to Harry’s wife, Meghan Markle. “He’s certain his mother would have approved of him leaving the royal family. Diana had tried to do the same, and he thinks she would be proud of him and his new life.” “Diana’s birthday is painful for Harry and William …