心在你那里你让我爱谁
[xīn zài nĭ nèi lĭ nĭ ràng wŏ ài shéi]
'My heart belongs to you, who do you expect me to love?' conveys unrequited love and disappointment when someone's affections aren't acknowledged or returned. There may also be undertones of jealousy if one wonders whom their love interest might instead choose.