Believing in yourself is a thing I rarely see, or feel. It's good to be yourself and know you're your own person. It was well said in this write, and I hope this is an inspiration to all the teens (and adults) with self esteem issues.
You used repetition here to your benefit, which is nice to see and nice to read.
I think the only suggestion I can give for this is to add more punctuation. Just because it makes it easier to read and take in from the readers point of view, also it looks more presentable.
Thanks for sharing.