Benvolio being the one aiding and encouraging him through his love with Rosalyn. .
Romeo ends up at the party by chance, one of Capulet's Servants can't read the Guest list, and by "chance" (Again, Fate?) bumps into Romeo and asks him to help not realising Romeo is a Montague. .
"I pray, sir, can you read?".
The servant tells him that if he is not a Montague then he must attend the party.
"And if you bet of house of Montagues, I pray come and crush a cup of wine".
It could be argued that this is an act of fate, yet Benvolio plays his part as well.
Had the Servant been able to read the list, or even bumped into someone else, Romeo may not have heard about or even gone to the party. Yet after he got invited Benvolio thought (being a good friend) it would be a good idea for Romeo to attend the party top get over Rosalyn. If fate had not intervened here and Romeo did not go to the party and met Juliet, R + J would still have died, just not at the time they did. (They would have eventually met anyway, due to the conflict. If they were really in love which they were, the circumstances would not have mattered) .
Another aspect suggests that they would not have died because Juliet would not have had to fake to fake death; had Tybalt not killed Mecrutio; Romeo not killed Tybalt; Mecrutio listened to Benvolio and went indoors to escape brawl .
Romeo though should have thought more carefully about attending the party, the consequences. But then again he did need something to help him through these tough times. Although fate is to blame for a lot of the happenings throughout, Romeo is more to blame in this case. The party was not essential to Romeo.
Juliet is not really cared for by her mother like a mother should; the nurse is more of a mother to her. When Lady Capulet suggests the idea of marriage to Juliet she is not that keen on the idea at first. .
"It is not an honour that I dream of".