he is in love with Juliet and wants to marry her
he felt like his world was spinning out of control
It is Juliet's nurse who interrupts Juliet's and Romeo's conversation on the balcony. She calls Juliet back inside, urging her to come back to her room.
Most of the dialogue in the "balcony scene" takes place at the window in Juliet's room. Only the final line is on the actual balcony.
Juliet was the first one to mention marriage during the balcony scene.
the nurse
Romeo and Juliet declare their love for each other.
Balcony scene
act 5,scene 3, line 74-120
She wishes he wasn't a Montague.
There is an old Warner Brothers cartoon about an amateur hour type competition in which a couple does the balcony scene--misunderstanding the meaning of the word "wherefore" of course.
the best scenes are the balcony scene and the last scene (when Romeo and Juliet die)
He brings him the news of Juliet's (seeming) death