Composite image of Jennifer Lopez, Matt Damon and Ben Affleck

Matt Damon, Ben Affleck’s wingman, shares his fears that his buddy could fall off the wagon as his marriage to J-Lo crumbles.

Distressed Matt Damon fears recovering boozer Ben Affleck may fall off the wagon amid his crumbling two-year marriage to Jennifer Lopez, RadarOnline.com has learned from insiders.

A source claimed the frantic filmmaker is pulling together his Batman buddy’s nearest and dearest to stage an intervention.

According to tipsters, Damon is growing increasingly concerned for his lifelong pal as jet-setting J Lo, 54, appears to be moving on without him.

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Source: MEGAAccording to an insider, ‘Matt wants those closest to Ben to remind him he is loved and supported — and better off without Jennifer.’

“Matt wants those closest to Ben to remind him he is loved and supported — and better off without Jennifer,” an insider alleged. “Everyone is rallying around Ben — including his ex, Jen Garner, and their kids, Violet, Fin, and Samuel. They’re keeping him occupied by suggesting fun things to do.”

The doting dad, 51, recently enjoyed a lunch date with Violet, 18, and took Samuel, 10, on a motorcycle ride around their Brentwood neighborhood.

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Source: MEGAAffleck’s ex-wife, Jennifer Garner and the couple’s three children have been rallying around Ben during this difficult time.