"Then, dreadful trumpet, sound the general doom! / For who is living, if those two are gone?" (3.2) Juliet says this to the nurse. She says that if Romeo and Tybalt are both dead then there is no point in living.
"Ha, banishment! be merciful, say 'death;'" (3.3) Romeo says this to the Friar when he learns he has been sentenced to banishment. He says he would rather die than be exiled.
"Let me be ta'en, let me be put to death; I am content, so thou wilt have it so." (3.5) This quote from Romeo shows that he would rather die than have to leave Juliet's side as she just said she didn't want him to leave.
