How come after I asked her out and nothing happened, she still keep on flirting with me a lot?

I have asked her out two weeks ago. She didn’t say “yes” and didn’t say “no”, she said she “will think about it”. After that I never mentioned it again any more because I think she don’t know what she really wants. I know she break up her boyfriend 3–4 months ago.

She all the times talk good things about me when I am around with her friends, but I don’t know what to do with it because she did not give me any answer at all and I don’t want to bother her any more. I have taken few steps back from her. I thought she will leave me alone now and I will go after another girl that is interested in me.

What I am not doing well and What she want from me and What should I do with it, if I should do something at all?