Jennifer Lopez 'Spent a Lot of Time' Helping Ben Affleck Navigate 'Dark Side': 'His Bad Mood Affects People' (Source)

Lopez spent "a lot of time making sure Ben was happy" before filing for divorce, says a source

Jennifer Lopez spent time and energy making sure Ben Affleck was happy during their marriage, a source tells PEOPLE.

The singer-actress, 55, filed for divorce from Affleck, 52, on Aug. 20, listing their date of separation as April 26.

A source close to Lopez tells PEOPLE she "did spend a lot of time making sure Ben was happy and had everything he needed."

"The way she cared for him was almost childlike," the source continues. "Friends constantly reminded her that she’s not responsible for his feelings. He’s very moody and dark at times. Jennifer appreciates life in another way. She’s very grateful for everything.”

Lopez and Affleck spent much of the summer apart, with her spending much of her time on vacation overseas and in the Hamptons while Affleck mostly stayed on the West Coast.

Related: Why Jennifer Lopez and Ben Affleck’s Marriage Ended: Distance, His Mood Swings and Two 'Very Different People’ (Exclusive)

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Another source close to Jennifer Garner, Affleck's ex-wife with whom he shares three kids, tells PEOPLE that Affleck "has never handled stress well."

"He doesn’t have good coping skills. He gets easily frustrated and tends to be moody. When he’s relaxed and in a good mood, it’s amazing to be around him," the source says. "But more often, he’s upset or frustrated."

"Many times, it’s just something small that he gets stuck on," the source adds. "He really doesn’t understand how his bad mood affects people around him. It’s just not fun being around that kind of negativity.” 

Related: Ben Affleck’s Rep Denies Kick Kennedy Dating Rumor: 'There Is No Truth to Any of It' (Exclusive)

Meanwhile, another source said Affleck is "doing well and is very focused" in the wake of Lopez's divorce filing: "He thrives when he has work projects. He's been great when it comes to the kids too. He's doing exactly what he wants. He seems very happy."

Affleck was most recently seen out to dinner with his longtime friend Matt Damon and his wife Luciana in Los Angeles on Sunday, Aug. 25. The pair recently produced a movie that Lopez acted in that will debut at the Toronto International Film Festival in September, titled Unstoppable.

Multiple sources told PEOPLE that Affleck does not plan to attend the festival's red carpet, while Lopez and Damon, 53, will be in attendance.

For more on Affleck and Lopez, pick up the new issue of PEOPLE, on newsstands Friday.

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