丢三丢四不丢你弃东弃西不弃你
[diū sān diū sì bù diū nĭ qì dōng qì xī bù qì nĭ]
Literally meaning 'losing everything but not you', this reflects a profound and unshakable commitment. Despite being forgetful about other things, the person promises never to lose their love for 'you'.