喜欢你是病我愿意放弃治疗
[xĭ huān nĭ shì bìng wŏ yuàn yì fàng qì zhì liáo]
The netizen's name translates to 'liking you is an illness I'm willing to forgo treatment for', which conveys an intense, unconditional love where the person feels that their affectionate feelings are so overpowering they would rather succumb to it instead of seeking a cure.