Rosaline and Juliet

After meeting the most perfect girl, you are madly in love. You even climbed into her garden to talk with her. You now have plans to get married, but the next day, the Montagues and Capulets get into get another fight. It's chaos, and your best friend Mercutio is fighting against Tybalt, Juliet's cousin, in the thick of it. Reluctantly, you step in, but Mercutio is killed by Tybalt's sword under your arm. Your best friend is dead! What is your reaction?