In front of his friends, he's the charismatic leader, but in front of girls, he turns into a blubbering idiot. He's the type to listen to what you want and change to your taste. Despite appearing quiet and inattentive, he knows how you feel and tries to understand what you want.
He's sort of perverted but doesn't have any real experience with girls. Thus, he might act like a pro but is still a child at heart that wonders what he did wrong to get you mad at him. He doesn't show his feelings well but when you cry and need him the most, he'll show bursts of emotions and be your support.