In the months leading up to the premiere of “And Just Like That...,” fans were wondering how the “Sex and the City” reboot would address the absence of Kim Cattrall as the crew’s fourth Musketeer, Samantha Jones. The writers tackled it early: She and Carrie had a falling out and were no longer friends. It’s not uncommon. Despite exchanging friendship bracelets with childhood besties and promising to be best friends forever, as we move into adulthood, our relationship needs change. Sometimes