Being put into the "woman" category by others always felt wrong. I never understood it. I never had the words to express the discomfort it gave me.
Now I do, and that alone is fantastic. Presenting femme and being treated as female is not the same as being a woman. Identifying in the nonbinary spectrum (!) and presenting an aesthetic you like is valid.

I want you to consider this: you may have nonbinary ppl in your life without you realizing it. They themselves might be unaware, apart from this slight discomfort. If you can, just refrain from "you as a woman/man" stuff. Do you really need it? Why? What does it really add? You're faced with a person, not a label.