The headlines leading up to Brad Pitt’s 60th birthday weren’t great. From ex Angelina Jolie, 48, bemoaning her inability to move and travel “as freely” amid their drawn-out divorce, to daughter Zahara, 18, dropping his last name and son Pax, 20, labeling the Benjamin Button actor a “world class a--hole” in a resurfaced Instagram post, “it’s been a really difficult time for him,” says an insider. “But he is looking ahead.”
So rather than wallow in the fractured state of his family, Brad — who officially turned the big 6-0 on Dec. 18 — “rang in his milestone birthday with some low-key dinner parties,” notes the insider, adding that girlfriend of over a year Ines de Ramon, 33, also joined him on a trip to Paris, where the duo stayed…