My friends were friends to my friends so I had a border friendship zone.

That is just great. I hate being in a situation where I'm friends with two categories of people who can't seem to get along with each other. In serious cases, it gets to an extent where one will be forced to choose between them.

That kind of person isn't a true friend so you did the right thing by cutting ties with her. Right from the start, she was after what you had to offer and then again, acts completely different when you're around her and her group of friends.