No one can be sponsored by a family friend. A U.S. Citizen can sponsor their parents, siblings and children. If someone came into the U.S. illegally, they may not adjust their status in the U.S. under most circumstances. If the child is under 18 and has been abandoned, abused, or neglected by his parents, there may be a way to adjust his status.
You may call me for a free consultation at (206) 724-1940.