New Love! Kourtney Kardashian & Travis Barker's Relationship 'Turning Romantic'

Longtime friends Kourtney Kardashian and Blink 182 drummer Travis Barker may possibly be on the verge of taking things to the next level, RadarOnline.com exclusively learned.

“Every since Kourt has been single, they’ve gotten closer and closer – to the point where he sneakily stays at her place now,” a source revealed.

The relationship between the two, who claim they are just friends, is developing into something more behind the scenes.

“Their friendship is definitely turning romantic, which has taken her by surprise,” an insider revealed.

Travis has apparently always had an interest in Kourtney, but “was always left on the shelf while she fulfilled her boy toy fantasies.”

However, Kourtney is finally ready to explore things. “She’s really falling for him,” the source told RadarOnline.com exclusively.

Kourtney has dated her fair share of guys since officially moving on from her ex and baby daddy, Scott Disick, 35.

Most recently, RadarOnline.com learned she'd been dating former football star and model David Dee Duron,

but he was based in Miami, so she “was not expecting the relationship to go anywhere.”

Back in December, US Weekly reported that Kourtney was caught flirting with singer John Mayer who “seemed very into her.”

Readers know that Kourtney has also entertained actor Luka Sabbat, 21, and was connected to One Direction’s Liam Payne, 25. She was also previously in a two year relationship with model Younes Bendjima, 25.