The friar is responsible for Romeo and Juliet's wedding and helps Juliet fake her death. Lord Capulet is responsible for forcing Juliet to marry Paris and threatening her if she didn't. Ultimately, the Nurse is responsible for the deaths of Romeo and Juliet, as she encouraged Juliet to marry and waited too long to stop her and convince her to simply marry Paris. All three of these characters were responsible for the death of Romeo and Juliet because if one had not done his part, Romeo and Juliet could have had a much happier life.