The above statement was said by Romeo when he talked to his cousin, Benvolio. This scene was enacted in ACT 1, Scene 1 of Romeo and Juliet. Romeo was pining over Rosaline.
Rosaline is Lord Capulet's niece whom Romeo is deeply in love with before even seen Juliet for the first time. This is very revealing about Romeo character and it is important to the story since Romeo first sees Juliet after trying to catch a glimpse of Rosaline.
