Should you be angry with this girl?
I'm guessing that you don't think you did anything to upset her, and there is no reason at all that you can see that she would change her mind?
Doesn't that mean she used you? That she played with you and disposed of you?
And you still want her?
Again - shouldn't you be angry with her?
Edit : having just read your other post - she may want you to be angry with her - if she did this to you just to prove that she's unlikable. She may have a victim mentallity.
In any event, I'd still ask 'shouldn't you be angry with her?'