Honestly, might be best just to end this friendship. She led you on and she knows she led you on. She liked the attention she was getting and now that she's been demoted to regular friend instead of romantic interest she's getting salty because she's not getting that level of attention anymore.

My advice would be to tell her you're still really upset about what happened and its going to take you a while to get over it. You probably won't be talking to her or hanging out with her for a while and you just need some space to clear your head. Besides you don't really want this girl hanging around when you get a girlfriend - she'll make things overly complicated and that's just not worth it.