As OK! previously reported, the singer, 22, gave some details about what went down between her and Davidson two years ago.
While on the June 29 episode of the "BFFs with Dave Portnoy, Josh Richards and Brianna Chickenfry" podcast, Portnoy asked about the rumors that she had a fling with Davidson.
"Where did you hear that?" Olivia replied. "How did you hear that?"
Portnoy said he had read about it on gossip site DeuxMoi. "I have it on good authority that pete and phoebe are in fact an item. He ended things with B-list popstar/influencer he had been seeing beforehand for phoebe," the site claimed, referring to Davidson quickly moving on with Bridgerton star Phoebe Dynevor.
O'Brien confirmed she dated Davidson, but she didn't think "anyone knew about that."
"He texted me and was like, 'I'm seeing someone else," she said of their split. "'So, like, I can't.'"
Even though things ended abruptly, O'Brien didn't seem upset about the situation.
"He's hot and he's really funny," she said. "And he's really sweet. He's a really sweet guy."
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"It feels good just to know that, like, we have this connection and we have our little bubble of a relationship world that we live in that, like, not a lot of people know about," the reality star gushed. "We were driving in the car yesterday and I just, like, looked at him and I was like, 'Thank you.' And he was like, 'What?' And I was like, 'For running errands with me, like, this is so much fun just to go to a doctor’s appointment or go to the dentist and just, like, run errands. I’m having so much fun.'"