Ben Affleck Devastated Jen Garner May Have Met Her Next Husband!

Alcohol and drugs aren't the only things Ben Affleck is struggling with these days.

According to a report, the actor is devastated now that his ex, Jennifer Garner, has finally found the man who could become her next husband.

Affleck, 46, "somehow thought Jen might stay single forever," a source told Heat, "and that no man would ever spend any time with his kids."

As RadarOnline.coms reported, Garner, 46, began dating food group CEO John Miller about six months ago, and the couple recently decided to go public with their relationship.

"Although Ben hasn't been short of women since splitting with Jen, she avoided dating until she met John," the source noted. "She made a point of never introducing him to her children until her divorce was official."

Now that Violet, 12, Seraphina, 9, and 6-year-old Sam have met their mom's new man, they're smitten too!

"When Ben and Jen met up with the kids, they kept talking about mommy's new friend and how much fun he was," revealed the source. "They were saying how he knows how to cook and doesn't like alcohol, which really got to Ben."