喜欢我的人都有病难怪我一直没吃药
[xĭ huān wŏ de rén dōu yŏu bìng nán guài wŏ yī zhí méi chī yào]
The literal meaning would be 'Those who like me must be sick; no wonder I have never taken medicine.' It's often used playfully, expressing disbelief or sarcasm towards those who express interest in them.