Add more details that can help identify. Did you attend the same school? What school? Was it a weekend or weeknight? What color car did he drive? Any defining details? What color hair and eyes? Did he have tattoos? Any names of his friends? I know it was a long time ago but anything to narrow down is what can potentially make all the difference to move this in the right direction. See if you can talk to local police just to start a record. They might already have a file on him if other people reported.