How to tell if she is flirting

Make he laugh a lot, but dont only do stupid things. When she laughs about a lot of things you say, that is a good sign. If she looks, then looks away, that's good too, in the end, you need to FEEL the ENERGY and make your own call if she is flirting.
I am flirting with a girl right now, only seen her once, hopefully again tomorrow, and I am not sure if she is quite yet, but when I talk to her, it makes me feel so good.