Co-parenting might not be as easy as they make it seem.

Ben Affleck and Jennifer Garner went to pick up their kids from school together, but they didn't look like they were enjoying each other's company very much! The actress seemed tense, and the Batman star seemed aloof, and the whole scenario just made us sad.

According to a new report, the Oscar winner is regretting his decision to break up his family, and chalking it up as a "midlife crisis."

"He’s not as happy as everyone thinks. The truth is, Ben has huge regrets about how everything went down with Jennifer. He misses his old life with her and the kids. The decision to move on from Jen and the kids has been very hard on him," a source dished to In Touch.

His girlfriend Lindsay Shookus knows her time is numbered, too.

"She thought Ben was over Jennifer, because he truly convinced her that was the case. Now she’s telling friends that she knows ‘his heart isn’t with me,’” the source added.

We have to hand it to Jen G for handling this whole situation with class!