People can't read your mind so if you're not clear about your reaction to their actions or words resentment can start to build. This leads us to the second reason you may find yourself fighting or in conflict with someone you care about. Something has been building for a while maybe it's a comment you can't let go of or a pattern of behavior that you haven't called out before believing that the other person will maybe recognize your disappointment themselves someday. It really happens. People aren't going to wake up and be like oh I think that person is mad at me and they're probably not going to even know where it started. Ask them why did you say that? Why did you think that