Ditched my girlfriend at a game.

Today it was planned for me and my girlfriend to watch a basketball game today. We got there and her friends sat with us too which is okay. Then she tried getting her friend to sit between us to seperate us, I thought maybe it was a joke at the time.

Then the whole time I was basically being ignored. Lots of the time my girlfriend even purposefully turned her back to me so I was cut off from talking to anyone. Her FRIEND even tried to put her hand on mine to hold my hand and she pushed away and said no and started holding her friends hand.

I was a little annoyed but it's whatever. Everything continues on and I try to talk to her. Everytime I talk to her she seems annoyed, I tried holding her hand myself a while later and she got super annoyed and said I was making her mad. I asked what I did wrong and she said "I don't know what your doing but it's making me mad so just stop." I asked if she wanted me to leave and she said no? I don't understand. Im so upset because this was the first time I got to do something with her outside of school. I'm trying to think of a reason for her actions. She has a lot of trust issues with men which we are trying to work through so I am just overthinking all of this. I don't know if she's being an asshole or if it's justifiable with her issues.