What does Shakespeare reveal about Romeo through Romeo's aside during Juliet's soliloquy?

If you are referring to Juliet’s famous, “O Romeo, Romeo! wherefore art thou Romeo?” monologue, then Romeo’s asides demonstrate his impatience and zeal. When Juliet mutters, “Ay me!” Romeo declares, “speak again, bright angel!” It is Juliet’s presence and voice that seem to affect him rather than what she says. He considers her to be a deity far above him, a mere mortal. Even when she says nothing, Romeo wants to respond: “She speaks yet she says nothing: what of that? / Her eye discourses.” He reads her thoughts in her looks and believes she communes with heaven. When Juliet states that she loves Romeo and wishes to be a Montague or for him to be a Capulet, Romeo wonders, “Shall I hear more, or shall I speak at this?” He yearns to talk to her, but also enjoys simply staring at and hearing her. He might even have a sliver of patience, enough that allows him to think about how to respond to and approach his love, the child of his father’s enemy. These interjections are very believable from a young man. They add to the scene’s sense of passion and exhibit Romeo’s youthful ardor.