There's a very hurtful habit of internal conflict called "poverty thinking and exhaustive worry." It means repeatedly obsessing over a small issue, such as a minor argument with a friend or a friend replying half an hour late, and constantly replaying the details in your mind, becoming more anxious the more you think about it. This repetitive dwelling on unpleasant events only causes you to continuously drain yourself over the same matter. For example, if a passerby bumps into you and doesn't apologize, and you hold onto it for a week, it's as if they bumped into you for an entire week.