"Is love a tender thing? It is too rough, too rude." (I.IV.25-26)
"If love be rough with you, be rough with love." (I.IV.27)
Romeo, Benvolio, and MercutioStreets of Verona
"But 'tis no wit to go... I dreamt a dream tonight." (I.IV.51-53)
"That dreamers lie often." (I.IV.56)
Romeo, Benvolio, and Mercutio are getting ready to crash the Capulet's mask party, and Romeo is still sad about Rosaline while describing a dream from the night before. (dreams)
"..I see Queen Mab hath been with you...she comes." (I.IV.58-59)
"Peace, peace, Mercutio, peace." (I.IV.101)
The idea of love often feels like a dream to Romeo, as we see later in the story. Here, Romeo is still in love with Rosaline and is very hurt and sobbing over their damaged love. This foreshadows the painful love to come, since he has to love and hate Juliet. He feels as-though he is dreaming a painful and a cruel love.
The dream motif is seen here as Romeo is telling Benvolio and Mercutio about his dream from the night before. Shakespeare foreshadows here, warning something could possibly happen at the masque based on Romeo's dream.
This relates to the motif of dreams due to Mercutio talking about a midwife named Queen Mab. He describes her as someone that comes in your dreams to fill desire, whether it's good or bad.