"We spent so many hours together. We had so many wonderful conversations and adorable moments and things like that and they don't get to see it."
During Part 1 of Temptation Island's finale that aired on Tuesday night, Karl chose to make things work with his girlfriend Nicole Tutewohl instead of further pursuing his island romance with Brittney after the show.
However, Nicole decided she needed more time to continue learning about herself and growing as a person, so she opted to leave Temptation Island alone and single.
Nicole's final choice allowed Karl to re-open the doors on the connection he had established with Brittney, as long as she would be willing to give him another chance after feeling "blindsided" by his betrayal.
Brittney, however, told Us before the latest episode aired that she "never had this kind of connection with a man before" meeting Karl.
"We would just spend days just staring at each other, into each others' eyes... and we didn't even kiss or anything for, like, three weeks in, because we were both coming from a place of so much respect for his relationship."
Brittney said she and Karl were invested in each other mentally and emotionally but Karl did not give all the way in to temptation until the pair enjoyed a sexy overnight date, during which Karl slept with the beautiful yoga retreat owner from Venice, CA.
"It was a really weird scenario to navigate... and then I really didn't see it coming," Brittney said of her bond with Karl.
"I never really met Nicole. I only knew what I was told by Karl and what he shared with me. He came here to see if he could trust her because that was really missing in their relationship."
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Although Brittney and Karl only had three dates together all season, Brittney assured the magazine they "had been together every single day for at least three weeks" by the time the final bonfire rolled around.
"I felt like we were an old married couple... We were full-on dating in this environment... It's totally disconnected from the real world," Brittney added.
As for what's next for Brittney, she will reportedly be hosting meditation island retreats in Hawaii, California, Mexico, Belize, Costa Rica and South Africa, and Us teased "Karl might be coming along for the ride."
Part 2 of Temptation Island's finale will air next Tuesday night at 10PM ET/PT on USA Network.