有情不是玩玩而已闺蜜不是见见而已
[yŏu qíng bù shì wán wán ér yĭ guī mì bù shì jiàn jiàn ér yĭ]
Explains that being in love or having close friends isn't just playing around or meeting occasionally but involves sincerity, commitment, trust, loyalty, which builds true connections and lasting bonds.