Yeah it seems that dj and neil used to be friends in childhood, but after all the mess happened with vidur and exposing to Mahajan's reality, both start drifting apart. Neil also don't like what dj has turned into as dj may be a innocent child with passion for music, but as he grown up he become this arrogant, snob, and status conscious person.
But again all these are assumptions.
Han tho episode mein thush thush k Kartik ko bharenge jaise local bus mein passenger chadhaya jata hai saying andar Khali hai tho hum inha DJ-Neil ko lekar hi assumption karenge na. 😈
64