In PEOPLE’s exclusive sneak peek at Monday’s episode ofThe Hills: New Beginnings,Audrina Patridgeheads out on a much-needed boating excursion with friends.

“It’s so nice to get out of the city and leave all my worries and issues at the shoreline, hop on a boat and just go,” she says. “This is my happy place.”

When she meets up withMischa Bartonon the docks, she reveals she invited a special guest to join them: her exRyan Cabrera.

“You did? That’s great!” Barton says. “What’s up with you guys?”

“He’s someone that I care about,” says Patridge, 34. “We always hang out and there’s no label or anything, right now. We just really enjoy other, and whatever happens, happens, I guess.”

“Ryan’s always on tour or producing, so whenever he’s back in town, we get together, we hang out,” she adds. “There’s always that little bit of chemistry and flirty-ness between us.”

Cabrera, 37, shows up, and the group boards the boat. As they head out, he grabs his guitar and hands Patridge a harmonica so they can perform a sweet song together — and their chemistry certainly doesn’t go unnoticed.

The Hills - Audrina and Ryan Cabrera

“I definitely think Audrina does have a bit of a crazy connection with Ryan,” says Barton, 33. “They’ve known each other for a very long time, but he still seems intent on being kind to her and making her smile and making her laugh.”

“Ryan and Justin couldn’t be more different,” she adds. “Ryan is totally the opposite, almost. It’s really fun to see her happy and free like this.”

Patridge and Cabrera were first linked in January 2010 anddated seriously, as documented on the original run ofThe Hills, beforesplitting in Mayof that same year.

“Ryan’s a very sweet guy and he cares a lot for Audrina, but he’s not ready for a serious relationship or to settle down,” the source said.

“They didn’t see a long-term future for now,” the source added. “They’re still friendly, though.”

source: people.com