你说的爱姐姐我给不起
[nĭ shuō de ài jiĕ jiĕ wŏ jĭ bù qĭ]
Directly translated, it says 'The love you speak of, I cannot give you.' The term 'sister' is used informally to refer to an elder sister figure, implying this might be coming from someone younger declining an offer of affection.