I cannot be in the air

I've been in poor health for quite some time now. My body feels sluggish all day, I have a persistent cough, and I can't think straight. But whenever I say "I'm not feeling well," no one pays any attention to me. "Are you trying to get attention by being selfish?" "You're the oldest daughter, so surely you can endure a little, can't you?" That's all the answer I get from my parents. I am Iris Miller, the eldest daughter of a ducal family. I have an older brother above me and a younger sister below me. My brother is named Hugo, and he is excellent in both academics and martial arts—the pride of my parents. My sister is named Liliana, and with her delicate and graceful appearance combined with her naturally weak constitution, she is doted upon by my parents. As for me, the middle child, perhaps because I was raised in an environment where my brother and sister were always prioritized, or perhaps because my parents constantly told me "don't be selfish," I became accustomed to always watching the faces of my parents and siblings and living accordingly. *This is also posted on Kakuyomu.