The quote can be interpreted in several ways. One interpretation is that Romeo is afraid of being caught by Juliet's family or by the authorities. He knows that if he is found, he will be in danger of being punished or even killed. Another interpretation is that Romeo is simply afraid of leaving Juliet because he loves her so much. He does not want to be apart from her, even for a moment.
The quote "I dare no longer stay" is a powerful expression of Romeo's love for Juliet. It shows that he is willing to risk his own safety in order to be with her. It also shows that he is deeply conflicted, because he knows that he must leave but does not want to go.
The quote is a reminder that love is not always easy. Sometimes, it requires sacrifice and difficult decisions. However, the rewards of love can be great, as Romeo and Juliet discover.