In the season 13 finale, Nathan learns that Megan is still alive. Though he still has feelings for Meredith, she pushes him to see his long lost love, which leaves her all alone as the sad Calum Scott version of "Dancing On My Own" plays in the background. But there's nothing more romantic than wanting what's best for the person that you care about. Plus, Meredith more or less realises in this moment that she's going to be OK dancing on her own.