The Irish model, who fell for Stephanie during their stint on CBB in January, is showing 'erratic behaviour' according to a new report.
The Mirror (Friday 4 March) states that his friends are becoming increasingly worried for him after the dramatic events of the past few weeks.
A source told the newspaper: "He's a loose cannon and he has really messed up this time."
After a very turbulent and brief relationship, the pair have split up for a second time amid news Jeremy slept with at least one other girl since meeting former Hollyoaks actress Stephanie on Celebrity Big Brother.
Stephanie is currently holidaying in Mallorca where she was rushed to hospital on Friday following a severe asthma attack.
Although she has not commented about the attack, she did go on social media late on Friday night to retweet a fan's message.
It read: "If you can love the wrong person that much, imagine how much you can love the right one."
A representative for Stephanie has confirmed to the Mail Online that: "After a whirlwind romance, our client Stephanie Davis has split from Jeremy McConnell. Stephanie will tell her own side of the story in due course."
Amid mounting rumours of Jeremy's infidelity, he confessed on live TV that he'd slept with 19-year-old dancer Caroline Pope during a personal appearance in Newcastle - but denies cheating, saying he and Stephanie weren't together at the time.
At the time, Stephanie was officially still in a relationship with her former boyfriend Sam Reece.
It is reported that Stephanie was given 'no warning' about Jeremy's appearance on Ireland's Today show, and the confirmation of his one night stand came as a HUGE shock.
She has since said she will "never love again" and that she is "broken".
The actress has also implied she has heard of a second girl, tweeting: "2 people in the space of an hour. The truth comes out."
Despite initially insisting he wanted to make his relationship with Stephanie work, Jeremy has now had a change of heart, insisting he is "done" with Steph.
He has said: "I'm just done. No smoke without fire. She knows what she's doing, she's a clever girl. I'm so done."
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