Calvin Harris is apparently working hard to get his relationship with Rita Ora back on track. Earlier this week the DJ flew out to Vancouver where his former flame is currently shooting the Fifty Shades of Grey film. An insider told the Daily Star: “Calvin is pulling out all the stops. She was impressed when he flew out to Canada to be with her, as she knows he’s really busy right now. “Calvin explained to Rita that she’s very important to him, and that he just can’t see where things have gone wrong between them.” Unfortunately for him, the singer hasn’t agreed (just yet) to get back together as the source explained: “Rita isn’t convinced yet. She knows Calvin is a really good guy. “But she’s really struggling to keep her attentions focused both on her career and their relationship. She finds it so hard being in a long-distance relationship, and their schedules seem to constantly clash.” The couple, who both posted pictures of their aquarium date on Instagram, called time on their nine-month romance last week. Calvin and Rita  visited an aquarium together (image via Instagram/ritaora).