长痛短痛不如从未心动
[zhăng tòng duăn tòng bù rú cóng wèi xīn dòng]
It roughly translates as 'A Long-term Pain or A Short-term One, It Is Better Not To Have Fallen In Love At All.' It indicates that falling in love often results in either prolonged emotional pain from lingering affection, brief anguish after separation, rather, never getting involved emotionally would be better. So this username reflects the feeling of wanting to dodge the potential pain by staying away from emotional investment before it even happens.