Today, Garner and Affleck remain close friends and choose to spend time together for the good of their kids. However, some sources suggest Garner’s boyfriend, John Miller, takes issue with Affleck.

"John is a great guy ... with whom she shares three kids — Violet, 17, Seraphina, 14, and Samuel, 10. Miller has two children with his ex-wife, violinist Caroline Campbell.

a source tells PEOPLE Jennifer Garner is dating CaliGroup CEO John Miller, a source tells PEOPLE. “They are casually dating but it’s not serious. He hasn’t met her kids,” the source adds.

Jennifer Garner clarified to her boyfriend, John Miller, that her recent outing with ex-husband Ben Affleck was solely for their son's birthday and not a rekindling of their romance. Garner ...

John Miller was recently seen with his ex-wife Caroline ... The same goes for Garner and Affleck, who continue to focus on their kids despite the occasional public attention on their interactions.

Backgrid/The Grosby Group Jennifer Garner was spotted enjoying a romantic dinner with her boyfriend, businessman John C. Miller ... plus she does not want their kids to see round two of their ...