One is proactive, the other is carefree and resigned to fate.
But what can be done? He just likes her. During this time, he has also been contemplating the relationship between them.
Their barrier, besides their personalities, includes the Han Family's disapproval and some issues of his own.
Regarding family approval, in a relationship, Shang Feifei indeed has no obligation to deal with his family relations. It's something he should handle himself. If he can't manage, it's fine for just a relationship, but if he wants to go deeper, she'll politely call it off.
As for his own problems, it's not the personality gap; it's their differing perspectives on life and the world.
