你别皱眉我会哭你别哭我不皱眉
[nĭ bié zhòu méi wŏ huì kū nĭ bié kū wŏ bù zhòu méi]
These sentences mean that if you frown I would feel so distressed that I might cry, but if you're crying then I'll force myself not to frown at you because I wish to always see a happy face from you. This expresses an intense affection for someone where the speaker wants their lover's happiness.