There's no point in consistently worrying about everything. What will happen will happen regardless. So breath, look on the bright side. Have some laughs, fall in love, accept what you can't change, and carry on. To actually live is courageous.
You are smart. You are beautiful. You are loved. You have a purpose in life. You will radically change the world. You don't have to be anyone else because you are perfectly and wonderfully made. You are more.