“Jen is great,” a source close to the actress tells PEOPLE in the magazine’s new issue. “She is still getting used to being single.”
Garner told reporters this week she hasn’t “been on a date” since separating from Affleck (they filed for divorce this April) and is “not interested in dating.” She added: “I would not have chosen this life for myself or for my kids.”
That doesn’t mean she wants to change it at this point, says the source. “She isn’t dating. She isn’t taking Ben back. She is happy where she is right now. She is a naturally positive and a very grateful person. She feels very lucky for her life with her kids.”
For more about Garner and Affleck’s lives now, pick up the new issue of PEOPLE, on newsstands now.
Garner, who cooperates with Affleck on co-parenting and has supported him as he continues treatment for alcohol addiction, “is on a strict schedule when it comes to the kids and tries to do as much as she can by herself,” says the source. But as her three children — Violet, 12, Seraphina, 8 and Samuel, 5 — have gotten older, Garner “has a bit more alone time,” said the source. She gets in a workout most days (she’s prepping for a new action movie), and at night, she will go out for “dinner with friends or for events with causes that are important to her.”
Garner has also been busy promoting her latest film, The Tribes of Palos Verdes. In the film, adapted from Joy Nicholson’s acclaimed 1998 young adult novel, Garner plays a mother on the verge of a nervous breakdown after her husband (Weeds’ Justin Kirk) leaves her for another woman shortly after they move to the ritzy beach community of Palos Verdes, California, with their two teenage children (Maika Monroe and newcomer Cody Fern).
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The film’s director, Brendan Malloy, says the actress was “a real leader on set” and challenged herself to play a very different type of parent than she is in real life.
“The hard part is she had to play a person that was so opposite to who she was,” Malloy explains. “She was playing a person who did everything wrong for her kids and was the victim, and she’s so not that way in real life, and that was a challenge for her to be that way.”
She’s also starring in the coming-of-age story Love, Simon alongside Josh Duhamel, due in theaters this March, and returning to her Alias action roots in Peppermint, a high-octane thriller about a young mother who seeks revenge on the people who murdered her family. “She is excited about filming again,” the source said.
When she’s not working or taking care of the kids, Garner has been busy interacting with her fans on social media. The actress has become a prolific Instagram poster of late, sharing everything from makeup-free morning selfies to holiday-themed memes to her workout routine as she gets in shape for Peppermint.
As for the holidays, the source said, “Jen is looking forward to a Thanksgiving break with the kids. Just like other special holidays, they are celebrating Thanksgiving with Ben. This is her choice. She wants the kids to have a fun, family celebration.”
• with reporting by SCOTT HUVER