没主动是怕最后被你甩
[méi zhŭ dòng shì pà zuì hòu bèi nĭ shuăi]
It translates into 'Didn't make the first move out of fear of being left'. People who use this username probably had experiences of initiating relationships only to get rejected, or they fear making the effort just to eventually suffer from disappointment and heartbreak.