If you are female and dream that you see or are a boy, then it is interpreted as masculinity in your character. Maybe you are developing the new masculine part or feature of your individual character. On the other hand, boy may indicate a sign of passion and desire. Maybe you have very emotional feelings about a real-life boy, who is on your mind all the time. He is important and significant to you. You may be in love with this boy and your ideas, thoughts and conceptions of him has carried over into your subconsciousness. The dream world is responding to your expressive feelings from real life. Additionally, this dream can represent that your motherly instincts may be taking over. If you are an adult male and dream that you see or are a boy, then it can be interpreted as symbolism of your childish personality. You have very playful, innocent, childlike nature. On the other hand, boy for a man can symbolize youthful enthusiasm and optimist. Or it alerts you to take care of not fully developed feelings of responsibilities. Maybe the immature part of yourself still needs to grow. Your inner child may be trying to draw your attention by showing in the dream as the boy. You should analyse some parts of yourself that need to be recognized and acknowledged for further development.
Read more about dreaming of Boy in other dream meanings interpretations.