Summarize this article:

There are many benefits to having smaller breasts, such as not needing to wear an underwire bra and having an easier time with breast exams. Physical activity is also easier for women with small chests, and you don’t have to deal with back pain caused by large breasts. Another benefit is that you'll have an easier time finding clothes that fit you. For example, you won't have to worry about being unable to close a button-up blouse. Being flat-chested shouldn’t define you. There are lots of other parts of yourself to appreciate, so spend some time thinking of areas of your body and mind that you do love. For example:  You may have beautiful hands, long legs, or a great bum. You might be a great listener, a loyal friend, or have a great sense of humor. Remember that you are beautiful and worthy, no matter the size of your chest. Looks only make up a small part of you who are. Create a list of skills and talents you possess and activities you enjoy to remind yourself of all the reasons you have to be confident. For example:  You may be a strong swimmer or be able to make every free-throw you shoot. You might be well-organized, a great friend, or very artistic. You may enjoy singing and dancing, excel in math, or have the ability to cheer up anyone who is sad.

Summary:
Embrace your flat chest. Appreciate other areas of yourself. Practice skills and do activities that make you feel good.