Am I the Asshole?

The original post: /r/amitheasshole by /u/Substantial-Pea-9286 on 2025-04-08 10:43:11.

My GF(27) and I (32m) have been together for around 8 months. Her and my friends have common interests. She brought up an event she wanted to go to with me, however she can no longer make it due to work. The other day I told her me and my friends were considering going to that same event together. She got super upset with me and has been very mad at me since that day. Am I being selfish or is she just being super shitty? If the roles were reversed and she wanted to do something exciting that I couldn't make it to and went with her friends I would be happy for her. This is also my first ever serious LTR so I'm also learning how to navigate things. I kind of just randomly brought it up to her out of the blue so maybe I could have been nicer about it. Anyways let me know what you guys think.