The Celebrity Big Brother contestant shared her love for the 33-year-old on Twitter during a romantic break to Dubai, showing followers a picture of them together holding glasses of champagne.
"What a wonderful time I've had!" she wrote yesterday (March 3). "Thank you @SteveAlce you've changed my world I love you."
The reality TV star, who was previously married to Westlife's Brian McFadden and Mark Croft, added on the site later: "At long last I've found my soul mate :) xxxxxxxxxxxxxxxx."
Katona's post was accompanied by an image of the couple sat next to each other, smiling, with Alce's arm around her.
The ex-Atomic Kitten singer revealed this week that she is living with Alce, but denied that they are getting married.
> Kerry Katona: "I have found my prince"