I personally think if she doesnt want anything with you, and that you know she has a rocky relationship record and you know how she handles things, you should think twice about liking her from today and on. Girls tend to do that, and sometimes they dont notice they are giving off signals to guys. And guys are by instinct pick up these signals.
I've been in your shoes before, girls giving off the wrong signals and you get into the friendzone. It really does suck, and girls just wont understand it. Guys need to be proactive in relationships, which is no doubt a hard thing to do. So dont be discouragaed, girls and relationships come and go.