爱不够爱你的人才受罪
[ài bù gòu ài nĭ de rén cái shòu zuì]
Translating literally, 'Loving less the person you should love is suffering'. It suggests that if one loves insufficiently or unfaithfully, they bring upon their own suffering and pain. Reflects regret of not having loved enough or the struggle of being unable to provide all the love expected.