The Cougar Town actress said on Jimmy Kimmel Live that she "adores" her spouse of 11 years, who she separated from in October 2010.
Joking with Kimmel that they were "trying" to make other break-ups look bitter by comparison, Cox continued: "I mean people do not understand why we are just fond of each other. We are best friends.
"So I know it's confusing but we're great and he was so funny on [his guest appearance in Cougar Town]. He's great to work with, I mean I adore him."
Cox even insisted that she had not been bothered by Arquette discussing their sex life with Howard Stern on his radio show just one day after their split was announced.
"He would go on Howard's show all the time and always regret for talking so much," she recalled. "He couldn't help it, and he was like, 'I hope you're not going to be mad at me'. But this is the first time that I actually called him and I was like, 'I hope you're not gonna be mad at me!'"
Cox claimed this week that she is not ready to date again, despite Arquette's instance that she should.
Watch Courteney Cox talk about David Arquette on Jimmy Kimmel Live below: