A teenager who suffered an acquired brain injury and whose friend was killed in a hit-and-run crash in Melbourne's north west has appealed for the driver to hand themselves in.

Still recovering from a fractured skull and crushed pelvis, 17-year-old Jasmine Vuong has returned to the intersection in Delahey where her friend Anthony Nguyen was killed three months ago.

"Nothing has hit me yet, maybe one day I'll realise that this accident actually happened, then I guess that's when I'll break down," she said.

Jasmine Vuong has returned to the scene of the crash for the first time. (9NEWS) (9NEWS)

At 11.30pm on January 27, Jasmine and Anthony were walking to her house in Kings Park from a nearby McDonald's when they were struck by a car and left for dead.

Jasmine said the last thing she remembered from that night was pressing the button to cross the road, before waking up in hospital.

The pair were a kilometre from Jasmine's home when they were struck by the car.

Anthony Nguyen and Jasmine Vuong were walking to Jasmine's house when they were hit by a car. (9NEWS) (9NEWS)

Jasmine only has fond memories from that night with her friend who "was just always so happy".

"During that moment he was telling me a joke so I just remember happy thoughts," she said.

They both suffered critical injuries and Anthony, an aspiring mechanic and popular student at Keilor Downs College, died in hospital the next day.

Jasmine has made an appeal for the driver to hand themselves in. (9NEWS) (9NEWS)

Jasmine was in a coma for 10 days in the Intensive Care Unit at Royal Melbourne Hospital. She has been home since April and attends rehabilitation sessions at the Epworth Hospital twice a week.

Physiotherapist Bernadette Dornom praised Jasmine and said she had "done really well".

"Times when it gets a bit hard, or things are a bit sore, she's attacked them all with a smile on her face," she said.

The police investigation is facing a major hurdle, with an appeal for anyone with information about the crash to come forward.

A car was seized and a 33-year-old man was arrested, but later released pending further forensic investigation.