Dear younger me,
Let's not care about what you look like, half the time people are so concerned about what they look like they don't have the time to notice what you're looking like. This applies to hair, clothes, face, skin in general. EVERYTHING. Also the people worth being friends with aren't going to judge you based on looks.
Not all best friends are forever, people are going to walk in and out of your life and they are all going to teach you something whether they were a nice person or not. It's important to remember there are so many people you haven't met yet so a few people don't matter in the grand scheme of things.
That also applies to arguments with people. Falling out with someone isn't the end of the world, you're so young and there are so many more people for you to meet. It's perfectly normal to not get on with everybody.
Don't stress over everything. Things at your age just simply aren't worth it. You have to ask yourself will this matter in years to come? Chances are highly likely they won't.
But my biggest advice is to stay positive, have fun and go out as much as you can. Cherish being the age you are.
Love always, Silvermxce xx