I need to know how to react.
Okay, yesterday I was at work training and I sat next to a cute girl. She and I would chat when the instructor wasn't talking and we really seemed to be connecting. But when HR came and asked for our IDs we both got out our wallets and I glanced a picture of a guy in a baseball uniform in her wallet as she opened it. They looked similar so I asked if her brother played baseball and she replied with 'huh'? So I commented about the picture and she said it was her boyfriend. I've made it personal policy to not get anywhere nearer than friend to girls with boyfriends so I pulled back a bit in the talking department but right after she mentioned her boyfriend she became outright cold to me. So today rolls around and she sits on the other side of the room next to another guy, and while yesterday she was fairly shy she now loudly flirts with this guy and glares daggers at me whenever the I turn, hell she glares at me pretty much the whole time, I even see it in my peripheral. So should I just ignore all the crap or is there some step I'm missing?