As you continue to grow and become an adult, you will live your own life. You will have times of happiness and times of disappointment. You will fall in love, and you will have your heart broken. Life has its ups and downs and is not always fair, but I know your strength and resilience will see you through.
While your mind is currently filled to the brim with a never-ending list of what to pack, what your host family and fellow students will be like, how hard your classes will be, etc. etc., I encourage you to take a moment to instead think about just how mother-freaking life-changing these next few months are about to be for you.
Laugh a lot, cry a little, and continue to make the memories of a lifetime. Always choose to live by your rules, and let others live by their own. This is your time, your moment, your life, and you're going to be great. So be proud of yourself, you're surviving on your (almost) own for the first time in your life.