Here's a breakdown of why:
* The speaker is torn between two opposing desires: He wants peace (peace from his longing for his beloved Laura), yet he feels compelled to engage in a "war" of love, continuing to yearn for her. This internal conflict is a key theme of the poem.
* He feels imprisoned by his emotions: The sonnet speaks of being "in chains" and unable to escape the powerful grip of his love. He is imprisoned by both the desire and the lack of fulfillment.
* He longs for resolution: The speaker expresses a desire for a change in his state, either to find peace or to be able to fully embrace his love. This is a yearning for a resolution to his internal struggle, not a defeat of love.
It's important to remember that Petrarchan sonnets often explored the complexity of love and its potential for both joy and suffering. "Sonnet 18" captures this complexity, showcasing the speaker's emotional turmoil and his struggle to find peace within his passionate desire.
In short, while the poem may appear to depict a state of despair and frustration, it's not about love being defeated. It's about the struggle to navigate the conflicting emotions within a love that is both powerful and ultimately unattainable.