Me (20m) am i wrong for expecting or requesting my gf (19f) to go down on me?

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So me and my gf have been dating for almost a year now and our sexual life has been great so far, Im her first sexual partner and she is my first sexual partner. We have sex atleast once or twice a month cus we dont live together rn. Sex is great and we enjoy it alot whenever we do it, so i have gotten a bj before and i have been wanting one for a while now (we had our first sex after 3 months of us dating) i have expressed my desire to her but she always ignores my request or says no. There have been times where she would send me reels on instagram and tell me how she would s\*ck me off and do this and that but she never actually does it. I always go down on her whenever she asks me for it and i love to do it for her and i do it even without her asking me to do it whereas if i ask her to go down on me she will just ignore my req and switche topic or make an excuse. I did tell her a few sometimes that i really want to experience it atleast once but she told that she feels weird about it and she doesnt really prefer giving bj cus she has never done it before and she does not like the idea of having a dick inside her mouth. See i love and respect her alot, shes the absolute love of my life and ik its her own preference to not perform it and maybe she is not comfortable with it so i dont want to force in onto her. But i really wished she would go down on me too the way i go down on her.