五脏六腑只能容得下你一人
[wŭ zàng liù fŭ zhĭ néng róng dé xià nĭ yī rén]
In literal terms, 'Only One Person Fits Inside All My Inner Parts' may sound odd, yet its poetic implication reveals that love or thought for one person is overwhelming to the point it occupies every corner of their heart completely. This is a very profound way to express undying love or obsession with someone.