The Christmas star in this story might be a symbol of destiny. It could be what brings the two main characters together, showing that their love is fated.
The Christmas star in this story could have multiple significances. It could be a sign of God's love or a miracle. Maybe the characters are in a place where they have lost faith in love, but the appearance of the Christmas star changes that. It could be the spark that ignites their love, a celestial omen that this is a special and blessed love that will endure, much like the eternal nature of the star itself in the Christmas story.