I can't get over a woman who has a boyfriend bcause she acts like she's into me...Do I wait? Talk to her?

My goodness you are confused, I'm a straight lady but have a lot of gay / lesbian friends. Sweetie don't do this to yourself, she obviously knows your les and she either is bi curious or just playing the game because she knows your attracted to her. If you really like her that much just ask her out again and if she declines or changes her mind just tell her ok and let it be. Dont let her play mind games with you. Go out enjoy life you will meet that someone special one day, all the best.