@Snlckers,
I think you'll need to handle this as more of a two-step process. E. g. (1) determine whether she's receptive to going out with girls and (2) ask her out.
Fortunately (I think), you can do both in one shot.
Ask her for a soda or coffee or the like after class. If you need a pretext, ask her about homework or her summer plans. Get through the soda or coffee, and have a pleasant time (
). When it's done, ask, "I had a really good time, Lindsay. Do you want to do this again? But as a date?"
You'll get the following possible responses:
- Sure, I'd love to!
- I thought this was a date (this is when you reply with your preferred equivalent of "D'oh!")
- I can't make it that day, how about ___?
- Sorry, but I've got a girlfriend/boyfriend (bonus as this will give you an inkling whether you'd have a future shot. The existence of a boyfriend does not preclude possible bisexuality, but the existence of a girlfriend would of course indicate reception to dating girls).
- Sorry, but I don't want to get too involved with the summer coming, as I'll be away (or working, etc.).
- Sorry, but I don't date girls. But I agree this was a good time. I'm sorry if I led you on in any way. Friends?
- No! (she runs away, slams doors, and joins the French Foreign Legion).
I doubt the last one or its equivalent (e. g. a virulent, homophobic rejection) is in the cards, particularly if your own sexuality is well-known.
Also, if she refuses the original coffee or soda, then consider the matter closed.
It's a minefield! Good luck to you.