<human>: Throwaway account because she knows my real account. 

I also posted this in r/genderfluid, but I think it belongs here. 

I've been dating Olivia (fake name) for five months now, her coming out as gender fluid predates our relationship by about three months. She identifies by female pronouns and 95% of the time she feels feminine or female. She is very caring, supportive, and really fun to be around.

Recently, however, she has been feeling more masculine. Now I don't care about her dressing more masculine. Hell, I kinda enjoy a "tomboy" look. I myself am comfortable with who I am as a straight cis man, so I don't care what others think either. 

But as she has become more outwardly masculine in these past several days something has changed. She seems to be more aggressive, and less communicative. We normally have intellectual conversations, something I love about her, but recently she kept shutting me down and being short. I'm pretty sure she became upset because I called her cute (in my defense, we use this term back and forth). And, funnily enough, she seemed to revert to using overtly feminine descriptions (cute, adorable..etc) when describing me, as if placing herself as the more masculine partner.

I'm not vying for dominance myself here, and I'm not being paranoid, I can tell something is off. I feel as though her personality has changed and mind games are being played. Having spent time in a war zone as a non combatant and as someone who went through a lot of bullying,  I can identify these dominance signs well. I'm pretty sure there is no problems in the relationship otherwise, We have a date night planned so I'm considering bringing this up.

What should I do? Do i say anything? Do I wait? Am I making a lot out of nothing?

Can you give me the gist of the text in a nutshell?
<bot>: genderfluid GF, acting more masculine. Her personality seems to be changing with it and I don't know what I should do.