Okay.
First off, learn as much as you can about the culture. I know thats a Duh! but still its very important.
Expect to be a novality. Girls will look, giggle, talk to you, maybe touch you. ITS NOT ABOUT YOU. Its about the rare. Don't read more into it then is there. Don't assume they all really want to be your friend.
I'd lay off the girlfriend angle (no pun intended). They will be, if you are lucky, friends. If you try to get a gf out of it too quickly you will find yourself back in the USA quicker than you can say "expelled."
Enjoy the attention if you can but know its fleeting.
BeeBee