Abbie Quinnen said they discussed marriage days before he announced "out of the blue" that he did not love her.
AJ will be seen by TV viewers tonight sobbing at his guilt over Abbie being set alight when a stunt went wrong.
The Sun on Sunday can reveal AJ is now dating model Zara Zoffany, 27.
Abbie insists everything was normal between her and AJ until he broke up with her.
Abbie says it came out of the blue and she didn't recognise the man she'd fallen in love with.
I thought we were madly in love.
In the space of a few hours he was messaging someone else and my world was turned upside down, Tracey says of her relationship with Lorri Haines.
"I was shaking and crying and he went grey".
AJ dumped Abbie on a park bench and told her he didn't want to be with her any more.
Abbie says she was left "baffled and still am" by the break-up.
She has been contacted by ex-Love Island star Curtis, 26, to collect her belongings.
Abbie has unfollowed AJ on social media and said she doesn't know him any more.
She is now focusing on her dance work in an upcoming pantomime, and her Ann Summers modelling career.
Despite her heartache, Abbie is determined not to let the split break her.