Austin Marx appeared in a Raleigh courtroom Monday morning.
"Gavin was a good friend to me and I really miss him. And I wish I could get him back, but I can't. There's nothing I can do," Marx said.
The North Carolina Highway Patrol says Marx admitted he was driving between 85 and 90 miles per hour when he lost control of a 1996 Chevy Camaro on Puryear Road near the intersection of Marks Creek, just north of U.S. 64 near Knightdale last December.
His passenger, 16-year-old Gavin Westover, died of his injuries.
The teens were on a lunch break from East Wake High School at the time of the accident.
"Our lives are shattered and full of grief since Gavin's death," Westover's father Ted Westover said. " It is now seven months since Gavin's death and we see little hope for joy in life."
Monday, a judge sentenced Marx to 10 days in jail and three years probation.
"Things that came easy to everybody else in your class will not come easy to you," Wake County Superior Court Judge Don Stephens told Marx Monday. "You'll actually have to work your butt off to make it in today's world because of that."