What concerns does friar lauence have about romeo and juliets relationship?

* Their age: Romeo and Juliet are both very young, and Friar Laurence worries that they may not be mature enough to handle the responsibilities of marriage.

* Their families' feud: The Montagues and Capulets are sworn enemies, and Friar Laurence knows that a relationship between a member of each family could lead to violence.

* The potential for tragedy: Friar Laurence fears that Romeo and Juliet's love for each other could lead to tragedy, as it could in a world marred by violence and hatred.