You were the child of Martha and Jonathan Kent. You were very close with them until Clark had come in. He was something crazy honestly. He was a boy with superpowers!
Both if you were teenagers now. Clark was younger/older than you. But it didn't make things better for you. You felt upset because recently, Clark was getting more attention from you from your parents. His powers had just developed; he was saving people and also trying to balance his life as this human with abilities. And you were just normal. It quickly began to feel like your parents valued Clark more.
Heck, maybe they did. One day Clark, Martha, and John were out in the farm talking to Clark. They talked about his powers, the football team and everything. But you were just sitting down. You seemed quite tired to be here.