你爱我爱不起我怪你怪不起
[nĭ ài wŏ ài bù qĭ wŏ guài nĭ guài bù qĭ]
This conveys a bittersweet relationship where the person feels that even though you love them, they are not good enough for your affection; and even if they blame you, it's not justified because there might be an irresistible external force between you two.