The pair were linked many times over the course of the series, with rumours flying around about their close relationship after Danny split from his then long term girlfriend.
But according to Bo, while she and Danny were "incredibly close", The Script frontman was eventually banned from seeing her.
“There was such an obsession with whether or not we were together and that put wild amounts of pressure on us," she explained today. “In the end a decision was made for him to not be around me. The process of writing my album Before I Sleep began when I was supposed to go with Danny to a Coldplay concert.
"It was meant to be an end-of-The-Voice present — for him and me. But he was told he was not allowed to, because he couldn’t be seen with me in public.
“So I ended up not going with him but someone took pity on me and invited me to Coldplay’s box, with Coldplay’s agent, who then wanted to sign me."
Speaking to The Sun, Bo added: “So although I said I have regrets about what happened, it led to so many other things.”
Bo, who finished as a runner up in last year's series, will release her debut album at the end of the month.