My gender identity has always been a constant even when I refused to admit what that identity was and it existed independent of my body because it was learned by my relations as a child with boys and girls leaving me with a deep sense of what gender tribe I belonged to. My gender identity was created because of others and by others in relationship to how I experienced myself contrasted against them and it has always been this way.
I largely ignored gender roles until I could change my outward appearance to than more comfortably step into these roles and to eliminate the dissonace my body caused me by being "foreign to me" as "unnatural" and this was always felt at my deepest core.
You want to be sure your identity comes from some place other than gender roles because otherwise what you feel may be the desire to rebel against the constraints of gender roles but without the actual gender identity to support this rebellion.
Feeling like a little bitty girl inside could be the contrast between your physical form that limits how you want to express yourself but this may have nothing to do with actually identifying as a woman. Gender identity is formed in the first years of life and unless you have always felt conflicted than I would urge caution because you may simply be making yourself miserable by desiring something impossible to attain while also not being suitable to obtain it as that inner person you were born as that must now live with what you have created.
I have seen some transsexuals become socially isolated because they transitioned but could not lose the physical features associated with the male sex and they had the unmistakable air of a man around them so they become gross caricatures of something abnormal that people find repellant, so avoid.
Someone that needs to transition will transition regardless but they than must live with the consequences of the physical limits placed on them by the limits of medicine.
You can do whatever you want if you can live with the consequences.
Extreme gender dysphoria will take you to a place where you do not care about the consequences "at the time" but this comes with huge risk.
In my opinion no one should ever transition unless they have always, since their earliest memories, identified as opposite their body and than secondly the social roles we perform with these bodies.
It is very easy to destroy your life. Please be careful and be sure what you are suffering from really is gender dysphoria and not fantasy and the social limits imposed on everyone in one form or another.
Rebellion, fear and fantasy can be a toxic mix.
