The couple were due to marry in early 2012 but called time on their eight-year relationship last autumn after growing apart, but the radio-and-TV presenter insists he and Heidi are still close.
When asked if they just drifted apart, he said: ''Yeah, it's just one of those things. But we're very good friends. I'm still supporting 100 per cent (in everything she does). I like to know she's alright.''
The former couple last saw each other at The National Television Awards in London last month and Dave - who co-hosts The Capital Breakfast radio show with George Clooney's ex-girlfriend LISA SNOWDON - admits it was great to see Heidi again.
In an interview with more! magazine, he said: ''We had a drink and a catch-up, which was great because we're both so busy. Then I had to leave early to get a good night's sleep and we went our separate ways.''
Heidi and Dave got engaged during a holiday to India in 2009 and the 'Freak Like Me' singer had even picked out a wedding dress before they broke up.