Prince Harry is reportedly “sad” that his children, Prince Archie and Princess Lilibet, aren’t closer to their family in the UK after seeing Princess Charlotte’s 11th birthday photos . “Archie and Lili are having a lovely time in California, but Harry is very sad that they are missing out on life with the rest of their family,” an old pal of the Duke of Sussex alleged to Daily Mail journalist Richard Eden . “Harry feels his children are missing out on the extensive family network that their cousins are enjoying,” the friend explained, referring to Harry’s estranged brother, Prince William, and Kate Middleton’s kids — Prince George, 12, Charlotte and Prince Louis, 8, who all attend the Lambrook School in England. Prince Harry (seen above with his family) is reportedly “sad” his children, Prince Archie and Princess Lilibet, aren’t closer to their family in the UK after seeing Princess Charlotte’s 11th birthday photos.…