How do I confront my french teacher about using masculine words (I'm physically a girl)?

Backstory (TL;DR) (you don't need to read this part):

So I've been having problems with gender for years. I'm not entirely sure what I am, but I definitely don't feel like a cisgender female. There's so many different labels for gender identities besides male and female, right now I'm just disregarding the idea of gender completely.

I'm having a hard time figuring it out, partially due to outside influences, and trying to fit the role of a female isn't helping. I don't feel a part of the role of a female in society or the role a female plays in nature. I've always had thoughts of how I might be more comfortable with my life if I were born male. What I'm having trouble with is figuring out which label I fit under. I ask that when answering this question, you do not consider that I'm "confused" or something, but rather just provide some advice for the situation. I don't think it matters if I don't have a label yet, it just matters if I want to do something that makes me more comfortable.

Main question:

So I feel more comfortable with gender neutral things and sometimes male things. In French, a female would use feminine verbs and adjectives by adding an extra "e", while the masculine words have nothing added. I feel better using the slightly more generic masculine words, and using feminine just doesn't feel perfect. So I decided that this year I would do myself a favor and use masculine, which I am more comfortable with. However, my French teacher has not noticed that I have made the choice to do this, and always corrects it, and writes "you're a girl" with a stick figure in a dress on my paper. I would like to tell her about the situation to avoid further corrections. However, she isn't usually the nicest person, and some say she's intolerant. My old french teacher is very supportive of LGBT, and disagrees with her on a lot of things. She was upset about her not realizing it was a choice.

So how would I go about asking her to use masculine and not be corrected? I was thinking of writing something instead of talking directly. What if she has a bad reaction?