"(We're) never getting married, but we're never getting divorced, which is fantastic," Carrey said in an interview with "Access Hollywood" that aired Tuesday.
The star of the soon-to-be-released thriller "The Number 23" said McCarthy was a wonderful person who is "much deeper than she's ever received credit for."
Timing -- and previously unsuccessful relationships -- are the keys to the successful relationship he has with McCarthy, Carrey told Shaun Robinson.
"She is a person who is very much about encouraging the best in me and I in her," he said.
When asked if he'd present McCarthy with a ring to show his dedication and friendship, Carrey cracked, "I bought her a Chloe purse. Isn't that good enough?"