Kathryn (34) has explained how she found it hard after Enda (38) moved out of their home in Kilmainham.
"It was good to have my own time to get my head around it and deal with it because it's not called a break-up for nothing.
"The good thing is, we are still good friends, which is great," she said.
"There is always going to be a huge sadness for a while. When you spend five and a half years with somebody, it's a long time and it's an adjustment. I think I'm still adjusting."
But the Voice of Ireland presenter, who regularly fills in for John Murray on his RTE Radio 1 show, said she managed to get through it thanks to the support of family and friends along with "the odd bottle of wine".
"There's always someone in a worse situation -- not that I'm making light of it or anything like that. It was a very difficult thing to go through but we were lucky that we were able to go through it privately and that we are still friends," she continued.
She also admits to Irish Tatler that "nobody wants to be single at 34" and that most of her friends are now married with kids, but she has had a very different life to them.