I can't move on from a woman who has a boyfriend because she treats me like she's into me...what do I do, wait?

Wow, you got a lot of details, but anyways, I think she is what they call bi-curious. She seems interested, but at the same time, she is hesitant because she probably has never had a relationship or actually flirted with another lady and two, she may be scared of you possibly rejecting her if she does come up to you.. The only one who knows what she is thinking is her, and if you really want to know, then you should be blunt and ask her what is up. Otherwise you are gonna keep watching her send you mixed signals and not know what to make of it.