The first half of Romeo and Juliet, with its bawdy jokes, masked ball, and love poetry, is more like a Shakespearean comedy than a tragedy. Only after Tybalt kills Mercutio near the play's midpoint do things become tragic.
Near the start of Romeo and Juliet's famous balcony scene, Juliet asks "Wherefore art thou Romeo?" Because the word "wherefore" means "why," Juliet is wondering why the boy she loves is called what he's called — not where he is, as many readers believe.
Juliet is a mere 13 years old, and Romeo is not much older.