Yes, this song is about her ex. But I honestly think it has more meaning in that for example in the verse where she goes “ I never knew, I never knew you could hold moonlight in your hands, and so own”
Her lover is the moonlight to her darkness
ncG1vNJzZmivp6x7rcXRopqipqSav7G%2BxK2YraGfo8Bvr86mZpqqmZa7onnGq5innJVkurC7zaWgoKCk