Confused about my gender identity

(This text is long, I'll add some spaces between for the sake of your eyes) So, I am a trans male, and I'm having issues with my gender. I've always, since I was little, seen myself as a boy. Up until I found what transgender meant I said "I wish I were a boy" or "I'm a boy in a girl's body.", of course. I always chose the boy main character in games, dressed as a boy online and even attempted to get into little boyish things like football and dinosaurs. (which obviously didn't work out). So when I discovered that I could change my gender and be who I wanted I was happy, and I never really had to come out to my parents, they just found out eventually and accepted me enough. They didn't say anything unless they had a question about it. (Thank goodness!) But just recently I became confused. I'm in a relationship with my girlfriend, who is Nocisma, (Or Neptunic). When I look in the mirror I don't see a girl or a boy. I usually dress very feminine, I just now found out my hair grew long enough to put in a ponytail, which made me look more feminine, but a while ago I was constantly mistaken for a cis male by my brother's friends, which is a VERY good thing to me, and were very shocked when they found I am trans! But it's really not that easy. I don't know who I am. I really don't see myself as a boy because of how I look, and I don't see myself as a girl because I've been a boy most of my life and I'm just so used to it. It's so hard to explain how I feel without sounding insensitive. Does anyone understand how I feel? and if so, what should I do? Any tips? I can go more into detail but I wrote enough and I don't want to overshare.