Romeo's behavior is a source of concern for his friends and family. They worry that he is going to hurt himself if he does not get over Rosaline. They try to convince him to forget about her, but Romeo is unable to do so. He is convinced that he will never find another woman who he loves as much as Rosaline.
When Romeo meets Juliet, he is immediately smitten. He believes that she is the most beautiful woman he has ever seen, and he is instantly in love with her. Romeo's love for Juliet is much more mature and realistic than his love for Rosaline. He sees Juliet as a whole person, and he loves her for her inner beauty as well as her physical beauty.
Romeo's love for Juliet changes his behavior completely. He is no longer the lovesick, melancholy young man who was pining for Rosaline. He is now happy and optimistic, and he is full of hope for the future. Romeo's love for Juliet also makes him more confident and assertive. He is no longer afraid to take risks, and he is willing to fight for what he believes in.
Romeo's behavior before and after he meets Juliet shows the power of love. Love can change a person's life completely, and it can make them do things that they never thought they would be capable of.