Is it normal that my boyfriend has this kind of female friend?

Ok, so I've been seeing this guy, N, for a few months. I left my previous boyfriend to be with him, because I strongly felt like we were made for each other. I mean, we're both fun, artistic, down-to-earth people and we have the same tastes and values.

However, there's this girl, L, that is friends with my boyfriend that I absolutely can't stand. She's one year older than he is (she's 20 and we're both 19), and she's the polar opposite of us. She likes fashion, clothes and money, she's filthy rich and she doesn't care about the rest of the world. It's not that she's a bad person, it's just that she doesn't fit with our personalities at all.

My boyfriend is the only one in our group that knows her, as they've met through a guy he knows from school that isn't part of our group. They barely see each other, but she texts him all the time. He told me multiple times that she's really annoying, but I see in his face that he enjoys getting her messages. To be honest, this girl is really beautiful (and she's asian, which I know my boyfriend loves), and he even admitted to me that she was one of the most beautiful girl he'd ever seen. A friend of his told me that N only liked the attention because he never got that kind of attention from this kind of girl, however I feel like probably likes her as more than just "this girl that gives him attention".

I know for a fact he's had a big crush on her before we dated, but she shut him down because she was not single at that time, and he apparently got over it. I also know, from looking at their text conversations, that he tells her everything about our sex life and about his own past adventures, even if she isn't really asking him anything.

It's hard to hate this girl, because I don't feel like she's really pursuing him, but I'm just really mad about this situation. Is she really just a friend like they say she is, or is he planning on getting with her?