Are there any sad songs about unrequited love?

Come back, Yoga Lin.

Rainy days, Laura, Nan Quan Mama.

A little closer, same as above.

You don't know, Melody Yeung.

Happiness never dies, Show Lo.

From the beginning to the present, Jeff Chang Shin-Che Shenche

Watching you quietly, Elva Hsiao.

I can't hear you, Fish Leong.

People all over the world know Wang.

Lonely, Lan Youshi.

Mermaid's tears, Nan Quan Mama.

This damn love, Jane Chang

Remember to forget, she

I heard that the prank kiss episode.