According to Us Weekly, the interior designer and Swiderski - who met on the 5th season of the ABC romance reality show - have ended their engagement.
"I love him and I'm really sad, but I have to look out for me," said Harris.
Swiderski added that the pair are "both kind of resetting", saying: "Jillian isn't happy and I'm definitely sad about the whole thing, but we've got to work through some things on our own if we decide to move forward."
Harris had previously told OK that she was moving back to her parents' home in Canada while the couple worked through their issues.
"It's not really a split though," she was quoted as saying. "We have just been having a tough time, and I needed to go back home."