我向来欢喜却为你沉默
[wŏ xiàng lái huān xĭ què wéi nĭ chén mò]
This username translates to 'I've always been joyful, but I became silent because of you.' It implies that the user is usually happy or talkative with others but becomes quiet in front of a specific person, often expressing admiration or affection.