Most Helpful Guy
He is a guy and he directly knows what guys want and what they are all about and just doesn't want to see you get hurt. Guys have this primeval protective instinct and he likes the power he has over you and his friends.
Most Helpful Girl
I think it's simple. He loves you and cares for you but yet at the same time he wants to act macho as he is growing up. Guys for the most part want to stray away from femininity. Maybe he knows the guys around him or his friends are a bit dangerous or risky and he doesn't want you to get in trouble with them?