不開心的英文金句有：
* I'm feeling down today.
* I'm in a blue mood.
* I'm not in the mood.
* I'm feeling a bit down in the dumps.
* I'm having a tough time lately.
* I'm not feeling like myself lately.
* I'm just not feeling the "mood".
* I'm having a hard time keeping a smile on my face.
* I'm feeling a bit down in the dumps lately.
以上表達都可以用於描述一個人當前的心情狀態，不愉快、不開心。