By Katie Harris Princess Anne could help Prince Harry with his struggles over being the spare to the heir, a friend of the Royal Family has suggested. The insider pointed out that the Princess Royal, 72, was the second child after King Charles before being pushed further down the line of succession by Prince Andrew and Prince Edward, but has gone on to “forge her own path”. The suggestion comes as Harry – who is living in the US with Meghan Markle after quitting royal duties in 2020 – has made a series of explosive claims about the Royal Family in his tell-all memoir Spare. The source told the…