How did Heinrich Heine use irony in his love poems?

Heinrich Heine’s use of irony in his love poems served as a critical tool to navigate the tension between his artistic sensibility and the reality of his experiences. While his work often employed traditional Romantic sensibilities, he remained deeply suspicious of them and the emotions they purportedly represented.12

His approach to irony can be characterized by the following elements:

• Bittersweet Skepticism: Heine’s love poems are frequently described as bittersweet and self-ironic. They display significant poetic virtuosity while simultaneously maintaining a skepticism about "poetic truth," effectively distancing the poet from the sentimentality of his own verses.12
• Desentimentalization: Throughout his career, his writing moved toward a process of desentimentalization. By weaving together liquid and discordant musicality, he challenged the adequacy of the Romantic tradition to address the stresses and anxieties of his age.1
• Integration of Self-Regard: His irony allowed for a new integration of his own self-regard, acknowledging his artistic genius while critiquing the very feelings he wrote about.1
• Evolution of Tone: While his early works in The Book of Songs focused on this self-ironic tension, his later poems, such as those in the Neue Gedichte collection, adopted a more disillusioned tone, particularly when addressing inconstant relationships.23