Is your girlfriend your girlfriend or your "brother's girlfriend"?
If the plot is chaotic, and your brother and your girlfriend break up, then you think too much, or you respect your brother and love your girlfriend at the same time. Because of your mental stress, your most respected brother and your favorite girlfriend appear in your dreams at the same time. As for breaking up! It can be understood that your daily life is too stressful, and I don't know if you have some kind of stress. In a word, if you think of some ways to relieve mental stress and your tense nerves, you won't have such strange dreams without thinking.
It doesn't matter. Dreams are dreams after all. I dreamed that I married a goddess. Turns out I daydreamed too much. Haha, don't think too much. Think happily. Dreams must be good dreams.
Off-topic, I am firmly opposed to the modern version of "Duke of Zhou". I want to say ... they don't know where the dream interpretation method comes from. It's hard to say that they know much about physiology. They know physiology and believe that science is right. So when they say "dream interpretation", they must be idle, dreaming and not working, in order to make money. Can't blame me for being rude, because modern dream interpretation is really unscientific.