Girardi, who was previously engaged to former The Bachelor: On the Wings of Love star Jake Pavelka, and Kahl, a former sixth-season The Bachelorette bachelor, had begun dating eight months ago and moved in together in August after competing on this past summer's second season of Bachelor Pad.
Reports that Girardi had dumped Kahl and moved back home to Florida had surfaced last week, however Kahl had claimed the couple was still together.
"We're just doing [our relationship] long distance right now. It's for the best," Kahl told Us Weekly in response to a Life & Style report about the couple's split.
However, Kahl finally came clean and acknowledged the breakup in a Sunday night Twitter posting.
"Yes Vienna and I have split. It's been 5 weeks now. I can't fake it anymore. I will always love, be there for her, and wish her the best," he wrote.
Girardi also confirmed the split in a separate Twitter posting of her own.
"[Kasey] will always be my best friend, but yes we have split. No idea what the future holds for us but we will always remain friends," she wrote.