I’ve been trying forever to remember a book that I read when I was young. I think I was 10-13. Mid-80s. There was a girl who moved to New York City in the summer. Because she had no friends yet (I think), she spent a lot of time exploring the city by herself. She rode the bus by herself and she went to the movies by herself. She was really into fashion and talked a lot about the outfits she was putting together every day. I think that there was a department store that she loved and maybe fantasized about buying something there? I think she did a lot of window shopping.
I don’t remember her interacting with any other characters, so I have no idea what the plot was. I just remember thinking that it was so cool that she was getting around the city by herself, and that she was so fashionable.

