I had a formal for my frat over the weekend and my original date flaked the week of due to her friend breaking up with one of my brothers. I was set up with a sorority girl who is a freshman, quiet and reserved kind. We get dinner the day we are matched up (I am matched with her by a member of our house) and the entire time she just kept laughing at not really anything and wasn’t the greatest conversationalist.

Fast forward to the weekend/day of formal. I pick her up and make small talk on the way to formal as normal but she was being quiet. When we get there she goes off to her friends. I didn’t say anything but greeted all the people there and introduced myself to the ones I didn’t know. I walk to my date and ask if she knows anybody and she lists a few girls and a few guys. She leaves again while I’m talking to people. During dinner, she doesn’t say really much other than occasional laughs. When we got our awards and I went up, she didn’t really clap. When it was time to dance I asked her to dance and she said she didn’t like dancing. Later in the night, she was dancing with a few of her friends. Afterwards, we were at the after party and she just disappears on me and goes off for a while and I lose track of her and end up just partying with the people that were still partying.

I haven’t tried messaging spoke her since and havent posted any pics of the event. Should I have just left during the event? What should I have done in this situation? Is it in bad taste to post pictures with your friends and not your date for this event?