What is the correct course of action for a girl who has suffered since childhood from masculine feelings and behaviors, is attracted to women, and feels as if she has "the mind of a man and the feelings of a man in the body of a girl," while desiring not to displease God?

As long as you experience menstruation, you are a woman and men must be treated as women treat them. It is not permissible to imitate them. The feelings you have towards girls carry no sin if you repel them and do not act upon them. We advise you to supplicate and seek refuge with Allah to avert evil from you, to address the matter by marrying a righteous man, and to consult psychological specialists.