<human>: Can you condense the text into a few key points?

My girlfriend and I recently ended our relationship mainly due to her cheating. We tried to make it work but she found out I confided in my brother on what to do when I initially found out what happened. This of course pissed her right off and I basically said "fuck this" and we broke up. It just sucks because I keep thinking if I would have kept everything to myself we could possibly still be together. I'm not sure if this is just because the breakup is so fresh or if I am actually an idiot for telling someone I'm close with when I was really hurt.

Thanks reddit
<bot>: GF of 4 years cheated on me in the summer, recently broke up because she was mad I told my brother she cheated