Getting preteens to follow God

Patricia
My son is 12 and still doubts his faith. I wasn't raised in church so I didn't raise my son that way till he was about 8. We go every Sunday for the last 2-3 years and youth group and talk and pray often together but he still doesn't know if he believes God to be possible. Help. He needs to build his relationship before the terrible teen years begin. Any tips welcome and yes I pray for him daily