别一脸深情的说我爱你
[bié yī liăn shēn qíng de shuō wŏ ài nĭ]
This nickname conveys some playfulness and perhaps a touch of exasperation. Translating it directly would be 'Don't look at me so deeply in love while saying I love you', implying it's poking fun at people who tend to express love in overly dramatic ways or expressing the speaker’s feeling being overwhelmed by such an intense expression of affection.