Hi CP, you have good reason to be concerned.
Jehovah's Witnesses are a high control religion that interferes with every aspect of a member's life. They take the bible very literally and males are considered the "head" of the woman so if this boy's family are "strong" in the faith that's how their household would be structured. They refuse blood transfusion even in event of an emergency. They discourage strongly higher education and keeping company with anyone not a witness, who they refer to as "worldly". Dating at such a young age would be frowned upon but dating a "worldy" person a definite no-no.
Ask questions if you can and of course we can try to answer any specifics here.
Glad you have started researching as their website is total dishonest PR spin.