The Question and Answer section for Romeo and Juliet is a great resource to ask questions, find answers, and discuss the novel.
I'm not sure that she doesn't think of boys: she just isn't excited to marry Paris, a boy she has no idea about. This obviously changes when she sees Romeo at the party: it's love at first sight.
I think the theme of young impulsive love would have been understood in a similar fashion as it is today. They would have understood arranged marriages better than the Western world does today. The audiences would have found R & J's love...
Out in the street, Romeo escapes from Mercutio and Benvolio. Mercutio calls to him, using lots of obscene wordplay. Benvolio finally gets tired of searching for Romeo, and they leave.