Romeo and Juliet seek help from the Nurse and Friar Laurence in order to get married. The Nurse initially tells Romeo that Juliet is a Capulet during the ball. Despite believing that Juliet should marry Paris, the Nurse agrees to help her mistress. Juliet then sends the Nurse to find Romeo so that she can plan when the two lovers will meet to get married. The Nurse ends up finding Romeo and explains to him that Paris plans on marrying Juliet. She then tells Romeo that Juliet wants to get married and sets up a time for Juliet meet up with him. After her meeting with Romeo, the Nurse returns to tell Juliet to meet Romeo at Friar Laurence's cell. The Nurse also gets the rope ladder for Juliet to sneak out of her home to meet Romeo. Juliet and Romeo then get married in secret.
Friar Laurence immediately agrees to marry Romeo and Juliet in secret. Friar Laurence then successfully marries the lovers in his cell. After learning that Romeo has been banished, Friar Laurence gives Juliet a sleeping potion and writes a letter to Romeo explaining that he should return to the Capulet tomb to meet Juliet as she awakens from her drug-induced sleep. Unfortunately, Friar Laurence's letter does reach Romeo, who believes that Juliet has died. Without the help of the Nurse and Friar Laurence, the lovers would not have been able to meet and secretly marry.
The Nurse and Friar Laurence sort of act like mother and father figures for Romeo and Juliet. Not completely, but that is a good angle to approach their help from. Early in the play the Nurse helps Juliet secretly meet with Romeo. She runs interference for Juliet and warns her if someone might be coming. She tells Juliet a lot of dirty jokes too.
Friar Laurence is not as close to Romeo as the Nurse is to Juliet, but the friar still acts as Romeo's counselor. He offers Romeo advice on how to proceed and at the same time warns Romeo to proceed with caution.
The big help in moving their relationship forward comes from Friar Laurence. Because the two star crossed lovers are deeply in love with each other, the next step is to get married. Since Romeo's and Juliet's families would never let that happen, they must get married in secret. That's where the friar comes in. Wedding done, big step forward. The problem comes later when the friar agrees to help Romeo and Juliet escape. They need his knowledge of drugs to fake Juliet's death. The tragedy is that Romeo didn't know that it was a fake death.