When the dreamer sees herself as a boy, when actually is a girl, then the dream symbolizes the masculine aspects of your personality. The most common meaning of this dream foretells that you already met some boy and have feelings for him and/or he left significant impression to you. There are some people in our lives that we find it hard to forget them or stop thinking about them, so this could be a very good example of you wanting to meet that special boy once again. Being all grown up and dreaming of being a boy foretells about the innocent and childish side of yours. However, sometimes being childish is not a bad thing, only if it doesnt make a bad impact into your life. If you take the responsibility and duties youve got to do, the dream stands as a very good omen.
Read more about dreaming of Boy in other dream meanings interpretations.