The beauty therapist, 22, said on the Love Island reunion show that she had "lost hope" until O'Shea showed up.
In the short video, Amber looks downtrodden and shakes her head, while Anna's sister Mandi says she's "fuming".
Greg has broken up with Amber and is blaming their busy schedules and now they want to focus on their careers.
Amber and Greg are reunited in Ireland.
"I was like, I'm never going to find an instant connection, this is the worst thing I've ever done and then you walked in", she told him. "Amber loved her time in the villa with Greg it's just not been the same since he left for Ireland".
An insider revealed: 'Amber feels used by Greg.
"He hasn't made any effort to come to London to see Amber, despite it being over five weeks, it's always Amber who had to make the effort".
The pair were the shock winners of the fifth series of Love Island after being coupled up for only 12 days, deciding to share the £50,000 prize.
The pair were due to appear on last night's instalment of The Late Late Show alongside Maura Higgins - and alas, Amber did not show up, leaving Greg to explain himself on national TV. "I've my law exams coming up".
"2FM Breakfast and Love Island are both potentially career defining gigs and to be involved in either would be a dream".
"I chose to come back to Ireland". She's gorgeous, smart amusing, she's the Queen of Love Island for a reason but you need to be realistic about the situation'.
Amber is furious that Greg didn't have the decency to break things off with her to her face.
"I'll definitely keep working with my auntie". We're mad about each other, she's gorgeous, smart, amusing personality but you need to be realistic about the situation.
Dancing On Ice has a history of recruiting Love Island stars.
Their alleged split follows the recent break-ups of Belle Hassan and Anton Danyluk and Harley Brash and Chris Taylor.