Ben Affleck is still adjusting to his newly single life.
Since splitting from Jennifer Garner in June after 10 years of marriage, Affleck, 43, has been diving into work. The actor is currently filming his latest directorial effort in Live By Night and promoting the highly anticipated Batman v Superman: Dawn of Justice, out March 25.
And it seems that keeping his mind on work has helped him heal.
"He is happier and a more fulfilled person when he's busy all day and night working," a film source tells PEOPLE in this week's cover story. "He's smart, dedicated and restless."
For more about how Garner has coped with the end of her marriage and her complicated life with Affleck, pick up this week's issue of PEOPLE on newsstands Friday
Regarding his romantic life, a friend says "he is not dating anyone."
While the former couple continues to sort out the details of their pending divorce, Affleck is doing his best to stay positive.
"Ben is doing great," adds a source close to Affleck. "He is as happy as he can be in this position. I don't think it's that easy, and definitely not that easy to do it in the public eye."
And as always, he relishes his life as a father, making sure to spend as much time with his three kids as his hectic schedule will allow.
"He's putting on a united front out of respect for the children and for her and for each other," adds a friend of the couple. "On that Ben has never wavered."