曾经你还在如今还想爱
[céng jīng nĭ hái zài rú jīn hái xiăng ài]
It translates to 'You were here in the past, but now I still wish to love'. The person using this username probably longs for someone who was once present in their life but has left. There's a hint of nostalgia and unresolved feelings in this nickname.