Romeo and Juliet are both upset. Both confide in their protector (friar and nurse), and go to the friar for help.
Naturally, Romeo and Juliet are both upset when they realize that Romeo has been banished. They are young and in love, and cannot imagine how they will live apart. Their parents do not even know they are married.
When Juliet finds out that Romeo is banished, she reacts with anger and frustration.