Romeo and Juliet are seen as immature because they are both very young - Juliet is just 13 years old and Romeo is around 16 or 17. They are impulsive and driven by their passionate love for each other, often making rash decisions without considering the consequences. Their decision to get married quickly and in secret shows their lack of maturity and inability to think logically about the potential complications and dangers of their situation. Additionally, their families are feuding, which adds another layer of complication to their relationship. These factors all contribute to the perception that Romeo and Juliet are immature in their decision to get married.
