Kristin Cavallari Isn't Dating Stephen Colletti (or Anyone): 'I'm Not Interested in Anybody'

Kristin Cavallari Isn't Dating Stephen Colletti (or Anyone): 'I'm Not Interested in Anybody'

Kristin Cavallari Isn’t Dating Stephen Colletti (or Anyone): She Is ‘Taking It Day by Day’

"That's the last thing on my mind," the Uncommon James founder tells PEOPLE exclusively about dating again

Kristin Cavallari broke the internet last month when she posted a cozy photo with her high school sweetheart Stephen Colletti — but the Uncommon James founder says they're simply friends.

"Stephen and I have remained really good friends over the years. I love him to death, but no we're not dating," she tells PEOPLE exclusively in this week's issue. "That's the last thing on my mind right now."

While the newly single Cavallari — she and estranged husband Jay Cutler announced their separation in April — hasn't totally ruled out finding love again one day, she's focusing on herself for the moment.

"I'm not interested in anybody right now. I'm happy. I just got out of a 10-year relationship," the True Comfort author says. "I don't really want to put energy into anything else right now, other than my kids and Uncommon James and my friends."

RELATED: Kristin Cavallari and Ex Stephen Colletti Reunite for a Photo

Kristin Cavallari/Instagram Stephen Colletti, Kristin Cavallari

In May, Cavallari announced the end of her E! show, Very Cavallari, after three seasons. The jewelry designer says she's "relieved" the pressure is off of her, but she's not ruling out reuniting with her Hills castmates for The Hills: New Beginnings season 2.

"I talk to Brody [Jenner], Audrina [Patridge] and Heidi [Pratt]," she says. "I just saw that they're going to maybe start filming soon, and I'm pretty sure I owe them an episode."

Kristin Cavallari/Instagram Heidi Pratt, Kristin Cavallari and Audrina Patridge

Though everyone's moved on from their party-heavy days of Laguna Beach and The Hills, Cavallari says she still has an unbreakable bond with the cast and crew from both shows.

RELATED VIDEO: Kristin Cavallari Breaks Her Silence on Divorce from Jay Cutler: 'It Was the Hardest Decision I've Ever Made'

Kristin Cavallari Breaks Her Silence on Divorce from Jay Cutler: 'It Was the Hardest Decision I've Ever Made'

Kristin Cavallari opens up about co-parenting and focusing on her kids amid divorce from Jay Cutler

"It's just fun. We'll always have that connection, and we'll always have something that we can relate to each other on that no one else can," she says. "It's just a cool thing to be able to share with each other."

As for one day starring in her own series again? "I don't think I'll do a reality show again," she says. "I'm happy taking my kids to school in the morning, going to the office and then coming home and cooking dinner. Rinse and repeat — my life is fairly boring, but I kind of like it!"

For all the details on Kristin Cavallari's life now, including raising three young kids and finding new joy after ending her marriage to Jay Cutler, pick up the latest issue of PEOPLE, on newsstands Friday.