My beloved sister is a INFJs. She was (in highschool) ruhig, calm, dreamy and reading many many books all the time. She wasn't shy at all, but like most of the INFJs, she would be tired from social interaction. But she had a natural and feminine way of behaving, which I guess most of the girls at that age didn't had. Actually, most of the girls would be with three guys in a week, so there wasn't anything interesting in girls like that. I know it at least from my perspective.
And many MANY guys were after her. I know this because I as her brother, I was the 'middle' way all the time, taking care of her. The idiots never dare to approach her. They were intimidated by her, like really intimidated. And they would awfully come to me trying to talk about her, somehow to make the connection trough me with my sister.
There was even a ENTJ (which usually are considered more bold) guy in highschool who in a camp approached her, but before a few weeks she already knew that he liked her.
So yeah, my little sister was "the unknown princess" in highschool. Guys were secretly falling for her, and still didn't have the b***s to come to talk with her.
I know another INFJ girl (which is not my sister), and her history is kind of the same. For some reasons or another, many INFJ girl are intimidating for guys.
We'll have to consider that most of the guys have a 'type' that are intimidating for them. For many, a intelligent girl who reads and doesn't f**k at every corner with every guy.