Why Am I Always Hungry and Thirsty?

I'm so ANNOYED!! I'm never full I'm never hydrated, I'm honestly sick of eating and drinking water there is no point!! Its like I'm eating food and its evaporating in my mouth, I'm starving all the time its making me frustrated 😭 I dont want to have diabetes. Bro why would I even have diabetes I don't even eat sugar like that, I'm literally the 2nd most active person out of my siblings (I don't wish it on none of them) BUT the person who have a high chance of getting diabetes is my brother or my little sister 🙄 ughhhhhhhhhhh!! Is their other medical issues that would cause dehydration and hunger? I'm low on iron would that cause it? I'm not peeing a lot, my pee isn't overly clear or overly orange, I don't think my pee smells sweet. I'm just hungry and thirst this has been going on for like 4 months now and when I tell my parents they just think I'm being greedy.