How is Romeo acting differently according to his father? What do we learn about why Romeo is acting differently?

Benvolio replies that he earlier saw Romeo pacing through a grove of sycamores outside the city; since Romeo seemed troubled, Benvolio did not speak to him. Concerned about their son, the Montagues tell Benvolio that Romeo has often been seen melancholy, walking alone among the sycamores.

the narrator is saying that the old lady made her feel uncomfortable. you know this because they say "i found that rather irksome", "perhaps it was her being so upright and trim", and "i don't think it was that, because i thought that quaintly pleasant." hope this !