Do not give up
Rejection is something Jack Ma, one of the wealthiest men in the world and the founder of Alibaba, is extremely familiar with and it does not seem to faze him. Jack Ma failed his university entrance exam 3 times. He applied to 30 jobs when he was looking for work and was rejected from all of them, including a job at KFC where 24 people applied and they hired everyone but him.
Jack Ma wrote to Harvard for a total of 10 times and was rejected every single time.
When asked about his failed applications to Harvard during the interview, he replied: "Someday I should go teach there maybe".