I have a crush, what should I do?

Okay so there is this straight girl that I really like. I really have a crush on her. She talks about boys a lot and she has said before that she wasn't gay. But, we've kissed before twice, and I'm always touching her real sensual like and she never tells me to stop. She said she's fooled around with a girl before in the past. We spend a lot of time together but I don't know....