@altbadgirl,
It's certainly possible (just to let you know, I'm a woman but not a lesbian) - it looks a lot like an attraction.
Why not ask her to a coffee? And have a lovely time, and at the end, ask if you can do it again but make it a real date.
1) She says yes! Awesome, please name your first kid after me.

2) She says no. Dang. But nothing ventured, nothing gained, and now you know.
3) She gets scared/says she doesn't like you that way. Also a less than wonderful outcome, but you can always tell her that you enjoy her friendship and company and hope the two of you can still be connected as friends, even if won't be anything more.
Good luck to you!