Italian, this girl is probably honeslty a really nice girl. Trouble is, other than her fairy tale, she doesnt know what she wants. U have to flirt with her a lot, neghit her, kino her and move in for the kill. Like u would do with any other girl. Trouble is, these types of girls are usually flirty and laughing with lots of other guys also. Although she should make it pretty clear if she likes you. She will give u a lot of eye contact if she likes you. (i.e. when she is talking to others, u will catch her watching you).
She will probably mess your head up, play you and then bail, although never letting you totally go, as u are always a good ego trip to her and she wont like to let things go easily. Plus if you are in a relationship with her, she will realise all her dream world was not real, and this will cause her to be colder to you at times. She will eventually realise how a "real" relationship is supposed to function, but this might takes a year or two for her princess attitude to fade away. All I can say is good luck, I have dealt with girls like this before and you are in for one wild ride, lots of ups and downs! But why not take it, you are young and might as well see how these hot princesses operate!