他说这是你的一厢情愿
[tā shuō zhè shì nĭ de yī xiāng qíng yuàn]
'He said this is your one-sided obsession/infatuation,' expressing disappointment in an unequal affection or attention, usually where emotions aren't reciprocated. This signifies a situation of misunderstanding or misinterpretation between people, particularly in romance.