No matter how good a person is, he doesn't hurt you, he doesn't care about you, and he doesn't have any use. Vows can be made up, romance can be disguised, and only "heartache" is an emotion from the heart. It can't deceive others, it can't deceive yourself, when there is a person who is worried that you will be hungry, worried that you will freeze, worried that you will be tired, worried that you will have no money to spend, worried that you will call and message you from time to time because you can't wait for his news, this person likes you from the heart! Love is actually very simple - it is "heartache" + "worry"