In the story Romeo and Juliet Romeo goes to the Capulet party to "examine other beauties" since the last person he loved rejected him. In the party he found his love of his life named Juliet when they encountered each other they saw "love at first sight" they started flirting and eventually kissed but later Romeo found out that the one person he loved was a Capulet and Juliet also found out that the only person she loved was a Montague. My personal opinion/reaction about how Romeo was feeling after the party would probably be despair or depression because he found out that the one person he really loves was his greatest enemy i also thought that because in the movie you can see on Romeos face its shows like he is shocked and doesn't know what to feel anymore which can be sadness or depression. I thought this song fit with how Romeo would feel after the party because in the song it has like a slow tempo and violins like fits the song perfectly.