The pair began dating towards the end of last year but ended their romance in January 2012.
"We remain very fond of each other because first and foremost we are friends. We got very close for a time but that's between me and Harry; what happened is between me and him, and then, you know, we decided it was best to be just friends," Flack told The Mail On Sunday.
"Harry is adorable, he is a nice person. He was nice to me; we were nice to each other. We are still friends, he's brilliant, he is so much fun.
"When you think of the real news stories - people around the world dying of starvation, being killed in conflicts or born into poverty - and then you think what I did: I went out with a younger guy and I am the front page news, it's just absurd," she added.
Flack recently confirmed that she will return to host The Xtra Factor for a second year starting this summer.
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