Your English is a little difficult to understand. Are you trying to say that when you date an Asian girl your feel reluctant to buy them something? Or does somehow an Asian girl coming into your view instantly kill all of your personal desire for shopping? Either one seems odd to me.
Being stuck up is not an inherent quality of Japanese girls, or girls of any nationality, for that matter.
People of any nationality, or any gender, can be stuck up, or they can be good people.
I don't mean to be rude, but judging from your posts, it might make it easier for you to have relationships with people if you stopped grouping people together and assuming things about them because of their nationality.