Jennifer Garner‘s rush to console ex-husband Ben Affleck as his marriage to Jennifer Lopez imploded has put her romance with John Miller on the rocks.

RadarOnline.com can reveal Garner’s relationship with the billionaire burger baron, 46, is in jeopardy because he felt completely neglected while she focused all her attention on consoling Affleck, 52, during his bitter breakup with J.Lo.

An insider said: “John is at the end of his rope with what he considers Jen’s ‘unfathomable’ support for her ex-hubby while ignoring him in the process.”

Source: MEGAJennifer Garner and John Miller are seen leaving the premiere of The Adam Project at Alice Tully Hall on February 28, 2022.

Garner, 52, and Miller have been together since 2018 – and there was even speculation they would get engaged until Bennifer 2.0 bit the dust earlier this year.

Garner and her Batman ex just spent nearly a week together helping their daughter Violet, 18, move into her college dorm at Yale.

Insiders said that spurred a furious J.Lo, 55, to file for divorce on August 20 – the second anniversary of their wedding ceremony in Georgia.

A source said: “J.Lo was making a point that she was humiliated by Jen and Ben’s ridiculous closeness. Don’t think John didn’t feel the same way.

“John is still incredulous the woman he was close to marrying pushed him aside to focus on repairing her ex’s love life. How is he supposed to feel?”

Source: MEGAAn insider said: “John is at the end of his rope with what he considers Jen’s ‘unfathomable’ support for her ex-hubby while ignoring him in the process.”

Sources added Miller is aware Garner has a past, but believes the time has come for her to live in the present to save this relationship.

Insiders also said Affleck is still blowing up Garner’s phone and Miller believes she should tell him to lose her number. Meanwhile, Garner is at the point where she wants to get back to focusing on Miller and letting Affleck work out his own problems.

She’s also spending more time trying to convince Miller she’s ready to commit to him for the future – if he’ll listen.

A source said: “Garner realizes she may have overplayed her hand by putting John in second place in this dynamic.

“Now she’s trying to woo him back and salvage the relationship.”