Discussion: I'm a 15-year-old girl, but I feel a dual sexual identity. Biologically, I am a woman, but I have a semi-masculine appearance. I'm confused by the whole situation.

According to your description, you probably have an androgynous (non-binary) sexual identity. This model suggests looking at sexual identities and orientations as an energy-based phenomenon rather than a genetic or social one. To understand the explanation, it is recommended that you read the article at the link below. It is essential to emphasize that this condition is an energy state, not a biological one.

Sexual identity mismatch — Androgynous (non-binary) people. (Women & Men)
Androgynous (non-binary) people have two sets of magnetic poles (Instead of one): one feminine and one masculine.
Both Androgynous men and women (often referred to as non-binary) look energetically the same. Androgynous people are simultaneously male-female twins at the energy level; they are usually not in a conflict that requires sex reassignment surgery, contrary to transgender people. Androgynous people have a dual, feminine, and masculine identity, not necessarily with conflict in sexual identity. Energetically, females and males look the same. It might also explain the visual resemblance.

Link: The Unified Energetic Model of Sexual Identities and Orientations. (Alixin's theory)
https://www.sf-healing.com/page/169 (Copy & Paste)