Final answer:
Romeo's state of mind in 'Romeo and Juliet' can best be described as a combination of being love-sick and infatuated with the ideal of love itself, reflecting the complex nature of Renaissance love poetry.
Step-by-step explanation:
Romeo's state of mind throughout Shakespeare's classic play 'Romeo and Juliet' is complex, encompassing a range of emotions that reflects the thematic heart of Renaissance love poetry. Initially, Romeo is melancholic and love-sick over his unrequited affection for Rosaline. However, as the play progresses and he falls for Juliet, his mood shifts to a passionate and idealistic love. Therefore, the best description of Romeo's state of mind is a blend of being love-sick and in love with love, as his emotions are intense, overwhelming and somewhat centered on the ideal of being in love itself, rather than solely on the person he loves. This aligns with the Renaissance literary exploration of love's nature and the self, through the lens of deep affection, and the burning desire for connection, whether with another person or a higher aspect like the divine.