I explain the situation.
I was traveling on the train for the company I work for, a coworker (A) approached me and told me to go to the galley because they were "bored."
I went, and while talking to them, the other girl (B) mentioned, while girl (A) was present, how nervous (A) was in front of me and that either she liked her (B) or she liked me.
Girl A fanned her face and made shy glances at me. Without breaking the ice, I showed her nervousness in a humorous way.
Shortly after, girl A showed me the photo of the guy she was talking to.
It turns out I like the girl physically, although I know we're different personally and we won't get along. But I don't understand why she brings up the other guy, and why girl B helps her "flirt" with me when she's clearly dating another guy.
Due to my surprise 😮, I didn't play along much, nor did I show any interest in her beyond a simple smile. These kinds of situations that catch me off guard kill me. Can you say I've stopped liking her already? Why did she show the picture of the other guy afterward? If she's dating someone else, why would she try anything with me?