What Girls Said 1
I'd definitely ask her why she didn't tell you, and figure out why she acted like she did. But seriously, don't just do away with her. You two can be friends, but if you don't want to be the "other guy," I'd recommend just leaving it to that. Good luck.
What Guys Said 1
Just be a friend. You don't want to get mixed up with something like that. Come to think of it, if she's the type to flirt even if she's dating you probably don't want to get mixed up with her either. Can you say headache?