Answer:
Romeo is in love with a woman.
This is the only right answer. Romeo never feels as though he has wronged Benvolio in the play. He knows he disappoints his friends at one point when he ditches them to go see Juliet, but it does not cause him despair. Romeo never misses his friends and family. At no point does Romeo want to fight the Capulets. When Mercutio is killed, he does seek revenge out of blind rage and kills Tybalt. The only thing that causes him despair is his love for Rosaline at the beginning of the play. Rosaline has decided that she will not be involved with any man and to live a chaste life. Romeo's unrequited love is what is causing him despair.