The NBA player, 30, shared an affectionate tribute to the Keeping Up with the Kardashians alum in honor of her 37th birthday on Sunday.
“Thank you for being not just an amazing partner, mommy and best friend but also being the kindest, caring and most loving human being I’ve ever met,” he continued.
Kardashian and Thompson have gone through several ups and downs over the years.
“I know the growth and all the work that he’s done, I know all of the help that he’s gotten and the constant efforts that he makes every single day and how hard he fought to get back with me currently,” she said.