Kristin Cavallari’s still very single … despite that recent video of her getting flirty and kissing a comedian.

Sources close to the situation tell TMZ … there’s nothing serious going on between Kristin and Jeff Dye, and in fact — we’re told they’ve only hung out that one time they were seen in Chicago looking like a new couple.

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LOVE IS IN THE AIR
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Our sources say Kristin’s just having fun right now and doesn’t have — nor is she looking for — a boyfriend.

As for how Kristin and Jeff connected … we’re told he slid into her DMs a couple weeks ago, and they happened to be in Chi-town last week at the same time, so they met up.

You’ve seen the result, but it was just a night of good fun. Our sources say Kristin was enjoying a weekend of freedom — it was her estranged hubby Jay Cutler’s time with their kids.

As we’ve reported … Kristin announced back in April she and Jay are getting divorced. Since then, things have gotten a little nasty … with Kristin accusing him of “punishing” her financially, and Jay calling her expenses “frivolous.”

Kristin insists there’s no scandal involved with their divorce, though … she says it just didn’t work out.

So will it work out with Jeff? Probably too soon to tell, but if you’re reading tea leaves … we’re told they haven’t seen each other since the kiss.