Act II of Romeo and Juliet is extremely important as it sets up the conflicts that must be resolved in the play. 

Act II, Scene ii is the famous balcony scene between Romeo and Juliet where they profess their love for each other. Romeo agrees that he will marry Juliet at 9am the next day.

In Scenes iii and iiii, Romeo gets the Friar involved by asking him to perform the marriage. All the while, Mercutio and Benvolio are growing suspicious of Romeo's behavior. 

The scene ends as the marriage is being performed. 

Act II is all about the profession and exclaimation of true love. It also created the central conflict that will ultimately end in tragedy.