The feud between the Montagues and Capulets is so intense that it is impossible for Romeo and Juliet to be together. Even if they were able to escape to another city, they would never be able to escape the curse of their families' hatred.
2. The lovers are both very young and inexperienced.
Romeo is only 16 years old, and Juliet is only 13. They are both too young to fully understand the consequences of their actions. They are also both very impulsive, which leads them to make mistakes that they later regret.
3. The lovers are surrounded by adults who are either unable or unwilling to help them.
Romeo and Juliet's parents are too caught up in their own feud to pay attention to their children's needs. The adults who are supposed to be guiding and protecting them are either corrupt or incompetent.