Brian Prahl / Splash News
It looks like the relationship between Kim Kardashian's good pal Jonathan Cheban and his stylist girlfriend, Anat Popovsky, is heating up.
"Lately, things have been getting serious. They're together all the time. Where he goes, she goes," a source tells E! News. "Kim has met her and really likes her—and she's very picky when it comes to who dates her best friend!"