Eva Campo said she had received “thousands” of messages.
“I just wanted to say thank you to everyone that’s reached out,” she said.
“I think a piece of him lives in a lot of people, including me.”
Nick was a talented sportsman, a brother and a son.
He turned 18 on Thursday, two days before the crash.
It was that milestone he was celebrating on Saturday night when the ute he and four friends were in rolled on Farrington Road, North Lake, hitting an oncoming Jeep.
Floral tributes have grown for the teen.
His old school said: “There are no adequate words to express our grief and sympathy around the loss of this wonderful young man.”
Cockburn Cricket Club’s message was: “We are thankful of the time we spent with Nick. A life well lived but gone way too soon.”
The 17-year-old accused of being behind the wheel faced court from his hospital bed, with his parents by his side
He was granted bail with conditions.
He can’t drive and is only allowed to contact one friend involved in the crash.