Straight Girl Falling for a Lesbian

First of all I am one of the most open-minded and socially sensitive people you'll ever meet so nothing I say is meant to offend anyone. 

I am a staight girl and I recently developed this huge crush on a girl. PLEASE DO NOT GET A CONVO STARTED ABOUT LABELS AND WHETHER OR NOT LIKING A GIRL MAKES ME BISEXUAL!  That is an interesting and useful conversation but it doesn't help me with this situation.

The situation is that I went to a party with some guys from my school and at the end of the night this girl started dancing with me. I guess you would describe her as a soft butch. I didn't notice her at first but she grabbed my hips and backed me against a wall and we proceeded to dance pretty dirty. We were both kind of drunk but I remember being ridiculously turned on and almost kissing her. I stopped myself when I realized what was happening. Now I think about her constantly. I found her on facebook and liked everything she wrote about herself, plus she's hot and she touched me in a way no man has been able to-just dancing! Long story short I'm really falling for this girl, I stare at her pictures, get all stupid and nervous like a teenager when I see her. I'm not even interested in the guys I've been dating anymore. I have always made comments that I should date a woman (because I have issues with the way men behave) but I've never actually been attracted to a woman this way.

The problem is now that we're both sober I don't know how to go about talking to her!  I don't know if butch lesbians like for the other woman to take charge and ask them out? I really can't wait for her to do it because it is well known among our college friends that I'm a huge straight flirt so I don't think she would even approach it. How am I supposed to let her know I'm interested when I have such a reputation for loving the men? She says I'm sexy but I never pay attention to it when guys say that because it just means they're horny-does it mean the same for women? How the hell do you let a girl know you like her when straight girls do things that could be considered flirting all the time? I'm a model so guys are usually very into me physically but how do I know if a girl thinks that same thing is attractive? Do I talk to her the way I talk to my girlfriends or the guys I'm trying to get? Will the things I usually do to flirt with men work on a woman? How do I know if she's reciprocating or just playing with me or if she thinks I'm playing around like so many straight girls and lesbians do with eachother?

I am just completely clueless about the dynamics of dating a girl and would appreciate any answers and advice you guys have!