Am I too proud of my face or have I not considered my parents' feelings? Why do I always feel guilty?

First, you must make sure. You are a filial child. You know you care about your parents and don't bear the psychological burden. A dress won't get your family into trouble. You have to solve this kind of thing yourself in the future. Don't ask your parents about your ability and how much you can do. Nobody will say anything about you if you don't buy it. After all, you are at school. The important thing is to study. If you feel guilty, study hard and make a lot of money in the future. Report to your parents.