Heh...I'm torn on this one.
Earlier I wanted to say that the sad truth is that a person who has a handful of TRUE friends is very lucky. I thought it sounded negative, and I'm not trying to diss the human race, but I think that "tried and true would lay down and die for you" is a rare connection.
I also thought she seemed like a princess type, but then I thought maybe some of the others are right: talk to her and tell her.
If she's really a jerk she'll be completely unreceptive, and you'll know.
Not for a few years, buddy, but if you do find a woman who is a tried and true best friend...marry her!