parasite 寄生虫

—Jessica said I can't think for myself. She called me a lemming! 杰西卡说我没有自己的思想。她说我没有自己的思想。
—Who cares what she thinks? 谁在意她是怎么想的？
—I do! It's still eating at me. 我在意！我没有办法不想这个。

This is eating at me.=This is bothering me./I can't stop thinking about it. 这个对我来说很麻烦，我不能不想。

This is eating at me. I have to study harder next time.

lemming 旅鼠，喻指没有自己思想的人