The correct response to the question based on Romeo's soliloquy is:
Romeo is so overjoyed by Juliet’s love for him that he is afraid he is dreaming.
In this passage, Romeo expresses his disbelief and amazement at how wonderful the night has been, specifically regarding his interactions with Juliet. His remark about being "afeard" and believing everything might be "but a dream" indicates his overwhelming joy and the surreal nature of falling in love, which leads him to question the reality of the moment.