Ruhani TBH I think u need some medical help( dont get me wrong, seeking medical help is not a wrong thing) bcoz there is nothing as "Becoming a girl". If ur deep self says u are a girl then u are, u dont need castration or vaginoplasty to prove ur self. Kindly Plz visit any psychiatrist or a mental health practitioner near you to clarify ur doubts and guide you further.
Queen