Does anyone know if any of the characters dated in reality

From what I know Cariba Heine (Rikki) and Jamie Timoy (Nate) have dated, I believe they are still together. And Indiana Evans (Bella) and Angus McLaren (Lewis) have also dated, though I'm not sure if they're still together or not, I haven't heard otherwise.

As far as I know those are the only confirmed relationships between the cast.

Yes. Cariba and Jamie ( Rikki and Nate) , Indiana and Angus ( Bella and Lewis) :)