I'm sorry, this is a short-answer forum designed for text specific question. We are unable to provide analysis on the forum. GradeSaver, however, has a complete study guide readily available for your use, which includes a poem analysis.
Study Guide for The Nightingale (Philip Sidney poem)
The Nightingale (Philip Sidney poem) study guide contains a biography of Philip Sidney, literature essays, quiz questions, major themes, characters, and a full summary and analysis.