Tina was first introduced to Weatherfield as a love interest for the bad boy in January 2008, but the pair later broke up and David (Jack P. Shepherd) is now married to troublemaker Kylie.
Meanwhile, Tina is about to find herself at the centre of a love triangle on the cobbles as ladies' man Tommy Duckworth and local doctor Matt Carter start competing for her affections.
However, speaking to Inside Soap, Keegan commented: "I really want Tina and David to get together again! I absolutely love working with Jack and I think the two of them are quite similar. They were very grounded as a couple - just normal.
"And when I work with Jack and Helen Worth, I feel like I'm home again. It's a little bit like having a comfort blanket."
She added: "The writers always loved writing for Tina and David, so who knows?"
Tina's storyline with Tommy and Matt begins in next week's Coronation Street episodes.
> Coronation Street Chris Fountain: 'Tommy, Tina will be a slow burn'
> Read more Coronation Street spoilers and news
Watch a preview of Friday night's Coronation Street double bill in the video below: