Ben Affleck is leaning on friends during his divorce from Jennifer Lopez … recently hitting the town with longtime bestie Matt Damon.

Damon and his wife, Luciana Barroso, hit up the Italian restaurant Toscana in Los Angeles with their kids Sunday night … where BFF Ben tagged along for the family night out.

Ben’s facial expression was notably neutral, but he did have a discernible pep in his step as he made his way into the hotspot.

Matt rocked a black polo and dark jeans, color-coordinating with his wife … who wore an all-black ensemble.

Matt was photographed beaming inside the restaurant — keeping things cheery, not letting any relationship woes bring his best bud down.

Ben seemed to have a good time with the Damon family … he was even heard laughing alongside the valet while grabbing his car after the meal.

Maybe BA was just happy to have the company … since he’s been ordering takeout for most of his meals lately.

Still, Ben doesn’t seem to be sweating his divorce proceedings. TMZ broke the story … J Lo filed for divorce from Ben last week … filing the docs at L.A. County Superior Court, where she listed April 26 as their date of separation.

We’re told there’s no prenup … and no settlement has been locked in yet, either. So, there could still be a legal battle ahead.