The TOWIE stars split up last year, but got back together during the Christmas special on the Essex reality show.
However continuous rowing is believed to be behind their break-up this time around.
A source told The Sun: “Chloe has no regrets about going back with Elliott – she took him away for his birthday last year and they had a lovely time. They also had a romantic Christmas together.
“But in the last few weeks, things have deteriorated and they’ve been fighting a lot. They have now decided that enough is enough and have called it quits.
“And this time round, Chloe is saying that over really does mean over.”
Mum-of-one Chloe, 31, sparked pregnancy rumours at the beginning of the month, when she posted a snap of 33-year-old Elliott resting his hands on what appeared to be her baby bump.
But reps for her later insisted it was just the dress she was wearing, denying that she was having a baby with dad-of-two Elliott.
It is believed that Chloe first broke up with him because he cheated, but wanted to resolve things for a “fairytale relationship”.
The source continued: “It’s obviously sad that their attempts to patch things up have not worked out. But Chloe believes this is for the best.”