We learned on Sunday night's series premiere that they'd been dating for four years before Dan apparently dumped Kate out of the blue and struck up a flirtation with Jess Wright instead.
But seeing Kate in Marbs brought back old feelings.
Now, speaking to the official website, he has said: "My feelings for Kate haven't really changed, to be honest. It's good to see her out here. I understand I have done wrong and there is a lot that has to happen before it will be made right as the trust has been broken.
"Not much has changed. I understand what I have to do. I know it won't be easy but I'm willing to try to get her back."
Kate made her debut on the show during Sunday night's series premiere, flying over to Marbs to join the gang in the sunshine.
She told him: "I'm not really too sure what to say to you, to be honest. At the end of the day, you broke my heart and humiliated me in front of my friends and family and got with Jess, what, four days later? I don't hate you but I think you're an idiot."
ITVBe kicks off a MARBellous night with Life On Marbs at 9pm followed by TOWIE at 10pm
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