My sister-in-law asked me to knit him a sweater. I didn't have time to knit it, and she was not happy. How can I express it?

Don't! Not everyone is selfish. Sometimes everyone has his own sufferings, but everyone has his own strengths and weaknesses, both of which have advantages and disadvantages. It is impossible for a person not to do wrong all his life. Don't always grasp the shortcomings of others or dwell on what he did wrong. Think about what he has done for you. Put yourself in his shoes. No one is right or wrong in love. You can't call him weak. He doesn't want this either. When a person loves another person very much, what he fears most is that the person he loves most will not be happy. Moreover, a woman needs a man's love most, and he needs this man to give her happiness. If you are a boy, you don't even know if you can afford the happiness of the woman you like. Will you still be with her? Are you still haunting her? If it were me, I would let this girl fly and let her find someone who can give her happiness! Maybe you'll feel selfish. In fact, I believe that the person who hurts the most is him. How happy it is for the beloved woman to throw herself into your arms, but because of her limited ability, she personally ruined her happiness, and the person she hates most is herself ~! You should be happy, shouldn't you? If you really love him, you should stand in the same place and wait for him, and let him create a good sky for you ~!