The friar accuses him of being ungrateful.
The Friar accuses Romeo of being inconsistent with his actions and quick to act rashly. He implies that Romeo is not thinking clearly and is not taking responsibility for his actions.
The friar accuses Romeo of being unmanly.
The Friar had it planned to advise Romeo by a note, but the note never got through which led to Romeo killing himself.
He wants Friar's help to marry Juliet and himself.
Friar John, who was carrying the message, got himself quarantined.
Friar Lawrence wants Romeo to do different things depending on what part of the play you are talking about. When they first meet, the friar tells Romeo to go slowly in his relationship with Juliet (as if!).
Killing himself
Romeo fails to receive Friar Laurence's message due to the epidemic occurring in the city. Friar Laurence gets quarantined and is unable to bring the letter to Romeo.
Friar Laurence's letter is not delivered to Romeo because Friar John was kept in quarantine since there was a plague in his house. Friar John wanted to go to Mantua himself but he couldn't. Once Friar Laurence hears this he says: "Now must I to the monument alone. Within these three hours will fair Juliet wake. She will beshrew me much that Romeo Hath had no notice of these accidents; But I will write again to Mantua, And keep her in my cell till Romeo come." His plan is to go to the tomb, get Juliet then write a second letter. But Friar Laurence's second letter is never sent to Romeo because Romeo's servant Balthazar has already told him Juliet is dead. Romeo arrives at the tomb before Friar Laurence can even write the second letter, which results in Romeo killing himself, which results in Juliet killing herself.
the friar... the friar...
Friar Laurence is Romeo's confidant, and the play suggests Romeo has known him since he was very young as it implies that the Friar is a religious leader. Friar Laurence is to Romeo; what the nurse is to Juliet.
Romeo defends himself by explaining that his true love for Juliet prompted him to seek help from the Friar in marrying her. He argues that his actions were driven by his sincere feelings for Juliet, rather than by an impulsive or reckless nature.
Friar Lawrence married Romeo and Juliet in his cell.