In this quote from "Romeo and Juliet," the speaker expresses a cautious approach to love and attraction. They suggest that they will allow themselves to like someone only if that feeling is reciprocated. The use of imagery about the eye signifies the depth of feeling and attraction, indicating that they won’t let their emotions run deep without the other person’s approval.
This reflects the theme of consent and mutual affection in relationships. The speaker emphasizes the importance of the other person’s feelings in shaping their own emotional response, highlighting a desire for a balanced connection rather than a one-sided passion.