怪我太温柔让你走
[guài wŏ tài wēn róu ràng nĭ zŏu]
A more nuanced way to express this is 'Blame Me for Being Too Gentle and Letting You Go.' It describes a feeling of regret mixed with understanding, acknowledging one’s gentleness and how it allowed the other person to leave, possibly without holding back or causing any harm.