Whether she knows you "well enough" is her choice, not yours. My advice would be to continue your friendship but never bring the subject of who she likes up again. If she starts the conversation that will be the sign that she feels like she knows you well enough. In the meantime, if you want to hang out with another girl, do it. That may help her sort out how she feels. If she has no problem with it, your possibilities don't look very good.