对不起只是忽然想你没关系也许依然爱你
[duì bù qĭ zhĭ shì hū rán xiăng nĭ méi guān xì yĕ xŭ yī rán ài nĭ]
The phrase conveys an apologetic sentiment for suddenly missing someone, admitting it doesn’t matter whether it’s acceptable or not because the feeling of possibly still loving that person remains.