my (16m) GF (16f) is constantly telling me that I dont love her and its getting exhausting

I love my girlfriend. I do my best to show that to her. I js feel like shes constantly accusing me of not loving her for small things. Like I dont look at her enough, she'll accuse me of not loving her. I accidentally dont call her the exact complement she was wanting me to (like saying shes pretty or cute instead of beautiful), she will say I dont love her. I end up feeling so frustrated because she'll tell me like i'm not doing something but i can remember so clearly so many times where i do do that stuff like physical touch is big for her and i give her a lot of physical attention but shes telling me that i dont do it enough and its something that shes had to deal with for a while even though I am constantly giving her hugs and kisses and holding her hand and scratching her head. Shes only starting to say that specifically because school has started and in school im hesitant to be over affectionate bc teachers have gotten onto me about it so i dont as much but when we are alone or going out im always giving her attention and I still do a decent amount at school. I also feel like a big thing is that a lot of the times that she says i dont love her are like misunderstandings, like ill say something or do something or act a certain way and she takes it in a way that I didnt mean it at all and ill try to explain to her exactly what i meant and she just refuses to believe me and it leaves me feeling genuinely so frustrated and like i js dont wanna try. I'm sorry this isnt very organized im js typing as im thinking. If I am in the wrong i am open to hearing y'all out but i js feel frustrated.