Natalie Portman has seen the light at the end of the tunnel! After coming to the conclusion that her and Benjamin Millepied’s marriage couldn’t be saved following his alleged affair, the actress finalized their divorce this past March. And though it took some time, a source said the mom-of-two now feels fully healed from the heartbreak. “Natalie is her confident self [again],” the source told a magazine, adding that Portman, 42, seems to have “a lighter step” and “more joy” in her eyes since the break-up. “She’s really coming into her own self-happiness.” Last month, the Oscar winner was seen …