His lady love didn't score an invite!

Ben Affleck celebrated his 46th birthday with his three children at Barton G restaurant in Hollywood last night, and the actor looked thrilled to be spending some quality time with his kiddos. That said, we bet he wished girlfriend Lindsay Shookus could join, but we know that Jen Garner has strict rules against her playing stepmom to their kids.

Speaking of his romance, apparently the Batman actor is fully in love with the SNL producer, and their relationship is only growing by the day.

"Lindsay is the girl next door. She's completely unpretentious. She is fiercely loyal to her friends. She's a rock to them and her family. She's the friend that is there during good and hard times and she's the first person to show up next to your side. He thinks she is very witty and charming and loves her company," a source dished to E! News.

"Lindsay is crazy in love. She would marry Ben in a heartbeat," the source added.

For now, though, the Oscar winner is focusing on his family and his sobriety. His ex-wife recently requested that he recommit to a recovery program if he wanted to see his two daughters and his son, so he's been dropping by a treatment facility almost daily since then.

We bet he's happy to leave last year behind him. That was a hard one!