Since that last letter was sent, Harry and Dudley never wrote letters to each other anymore. The Dursleys moved to a more magic friendly house with the connection to a Floo Network. Harry and Dudley visited each other very very very often. They spent Christmases, Birthdays and other holidays together. Harry's family was invited to Lyla's wedding. Dudley's family was invited to Albus', James' and Lily's weddings too. They never fought again, but sometimes there was tension between the cousins, because of their past. Harry never wanted to take anything back. He was happy about how his life turned out.
