<human>: Condense the text into a few key points

My girlfriend and I had talked about spending this weekend together since she would soon be traveling home for the holidays, and this be would our last weekend until new years. Also, I didn't travel out of town for my company holiday party so we could go to hers and not be apart this weekend. On Saturday morning, she mentioned she was invited to go an all day event with friends on Sunday. I didn't want to be a wet blanket, so I told her she should go if she wanted. I was hoping she would have a similar perspective to me about priority and want to spend time together instead. She decided to go, and now I'm upset.

I think the main reason I'm upset is not so much that she went -- but that we clearly have different perspectives on priority of each other if it was such a clear cut decision for her. I've had relationship issues in the past regarding prioritization, so it's possible I'm overreacting, or that this is a valid problem.

Am I off base here?
<bot>: Girlfriend prioritized hanging out with friends over spending weekend together, even though we had plans. Am I wrong to be upset?