What are examples of Romeo and Juliets commitment in Act 3 Scene 5?

R and J argue about whether they need to get out of bed and be away from each other. Romeo launches into a speech about how he would rather die than be away from Juliet, 

Let me be ta'en. Let me be put to death.
I am content, so thou wilt have it so.
I’ll say yon grey is not the morning’s eye.

Later,Lady Capulet tells Juliet about the plans for her marriage, believing it will cheer her daughter up. However, Juliet refuses, insisting she would rather marry Romeo Montague than marry Paris.