I Have One Goal In Life

I have a goal that I want to make come true very fast. Only I know about this goal because I don't know how to tell others what my goal is in life, even though my goal is more like a dream..I want it to become reality. My parents are very supportive but I cannot tell them I want to be a dancer because I'm not sure how they would react. Please give me advice how to tell my family and friends on my goal/career in life! I appreciate it thank you!