Why to waste brain energy on thinking about people who disregard you

Problem : Too much worried about the people who have mistaken you, hurt your feelings, offended you. Solution: My friend told this : Why to lose our brain energy on thinking about people who disregard us. They do not deserve your memory space. Often you feel you are hurt by someone, remember not to waste your brain energy on thinking about people who did that. Ask within yourself every time when you encounter thinking of unplesant interactions : why should I waste my brain energy on this thinking. You would find the results are fruitful.