The reason for your separation may be some trivial matter, or you may have made a temporary mistake in your choice. It seems like your emotions are developing very quickly, and since you haven't spent much time together, you didn't know much about each other. At first, it felt like things were going well. However, as you spent more time together, the significant differences in your personalities and differences in thoughts caused gaps in your relationship. Not compromising and the contradiction in your attitudes further escalated the situation. He still harbors a lot of dissatisfaction in his heart, and the probability of you both reconciling is relatively low.