Final answer:
The Nightingale's song in Twelfth Night exemplifies unrequited love through its portrayal of profound longing and sacrifice, symbolized by the Nightingale's own pain and the Student's inability to procure a red rose for his beloved to dance with him.
Step-by-step explanation:
The song 'Ne' from Act II, Scene III of Shakespeare's Twelfth Night highlights themes of unrequited love. The references in the lyrics, as detailed in the student's passages, emphasize love that is intense yet not reciprocated. The Nightingale's sacrifice and the Student's longing for a red rose he cannot have symbolize the pain and passion associated with unrequited love. Examples such as the Nightingale's willingness to die for the creation of a red rose and the Student's deep sorrow because he cannot dance with his beloved unless he presents her with a red rose reveal the depths of longing and despair that accompany love that is not returned.
This is further reinforced by the Nightingale's observation of the true lover's sorrow and her decision to press against the thorn, experiencing physical pain paralleling the emotional pain of the Student. Quotes like 'What I sing of, he suffers-what is joy to me, to him is pain' and 'But with me she will not dance, for I have no red rose to give her' directly showcase the lament of unrequited feelings.