你并非我良人怎知我情深你并非我良娣怎知我情长
[nĭ bìng fēi wŏ liáng rén zĕn zhī wŏ qíng shēn nĭ bìng fēi wŏ liáng dì zĕn zhī wŏ qíng zhăng]
Translates to a deeper statement: 'You're not my ideal partner (in marriage, etc.), so how could you know the depth of my feelings?' followed by 'You are not my kindred spirit/consort, how could you understand the intensity of my affections?'. It implies a level of intimate understanding or connection sought but felt absent from a specific relationship.