她是你心爱我是你心碍
[tā shì nĭ xīn ài wŏ shì nĭ xīn ài]
It means 'She is the love of your heart, but I am an obstacle in your heart'. It describes unrequited love and expresses the pain of the third party who stands between a couple. There are feelings of sadness and frustration about being a hindrance or barrier.