Why doesnt Barbara allan return sir johns affections?

Barbara Allan does not return Sir John's affections primarily because she perceives him as insincere and self-centered. Despite his declarations of love, she feels that he took her for granted when he previously rejected her, which breeds resentment. Additionally, Barbara's sense of loyalty to her own feelings and values leads her to prioritize her own emotional integrity over societal expectations. Ultimately, her rejection serves as a form of empowerment in the face of unrequited love.