Jennifer Lopez is finally ready to shut the door on Ben Affleck after filing for divorce from the actor in August. “It really did a number on her,” a source said of the split. However, as of late, “friends and family have noticed a major shift — she’s finally ready to move on,” the insider dished. “She decided to do some introspection — she says four divorces will do that. Get ready for an all new J.Lo — she wants to start a new chapter.” The singer, 55, who married the actor, 52, in 2022 couldn’t make things work, leading them to split two years later. “J.Lo was so in love with him and gratef…