The glamour model, real name Katie Price, dumped the cage fighter, 34, moments after quitting I'm A Celebrity...Get Me Out Of Here! last month.
Jordan, 31, claims she made her decision after learning that Alex told a tabloid he planned to propose.
'I'd always told Alex that I didn't want another "Peter Andre and Kate" relationship,' she explains.
'I'd asked him, please, to stay away from the media, and after the first time he gave a story, even though he was saying really lovely stuff, I told him, one more lapse and that would be it between us.'
Jordan and Alex later had a heart to heart at an Australian hotel and she admits they could be getting back together.
'I was really falling for this guy and I can't switch off feelings just like that,' she tells Hello! 'So I'm not entirely ruling out anything between us.
'Strangely enough, I feel more hurt from this split right now than I did with Pete because I had known for some time from seeing a counsellor that it probably wouldn't have lasted.'
Where to next?
- Celeb body language
- I'm A Celebrity
- Reality TV couples!