It's easy for someone to joke about scars if they've never been cut.
Juliet looking at the night sky
Juliet Minding Her business
Oh, my! Oh, Romeo, Romeo, why do you have to be Romeo? Forget about your father and change your name. Or else, if you won't change your name, just swear you love me and I'll stop being a Capulet.
Romeo declares to Juliet
Romeo Scaring Juliet
I don't know how to tell you who I am by telling you a name. I hate my name, dear saint, because my name is your enemy. IfI had it written down, I would tear up the paper.
In this scene you can clearly see that Romeo is thinking about what Benvolio and Mercutio had said to him. So he goes to this 'secret place' to think and try to define why he is so lost and confused. And why no-one understands the way he feels for Juliet.
In this cene you can see how Juliet is taking to herself, she is trying to understand why Romeo and her can't be together and live a happy ever after. She is looking at the sky thinking she is alone. (See the creepy looking guy behind the bushes? That's Romeo)
Romeo is surprised to see Juliet. he stares at her talking to herself and when she says something about changing his name, he speaks up. He is so focused and stressing his love for her, and that he would do anything for them to be together.