First of all, you'll glow up. I promise.
Secondly, stop worrying about making friends. I know it's hard to look at your social media and see everyone else you used to know to make new best friends and memories, but you will too in your own time. Instead of focusing on everyone else's relationships, start a healthy and positive relationship with yourself. This is the time to figure out your own opinions and image. Do fun activities by yourself or talk to someone in class you normally wouldn't talk to. Do whatever will make you feel good, and eventually, you'll find that there are people just like you who will motivate and support your self-love. Those are the people you will want in your circle of friends.
Also, don't pretend to be something that you're not. Sure, the "trend" might be that girls wear big frat shirts and Nike shorts, but that doesn't mean that you HAVE to be just like them. Dress nicely to class if that's going to make you feel successful. Don't wear makeup if it's going to irritate your skin. Your hair doesn't have to be curled perfectly every day for you to fit in. BE YOURSELF.
Important: boys suck, but not all of them. Unfortunately, you're going to meet a few duds in your next couple of years. You'll get your heart broken a few times, you'll start to resent the thought of meeting new people, and then you'll begin to feel left out of being in a relationship. It's a vicious cycle, but let it happen! Keep your heart open and out there because one day, after a steak of terrible guys, a really, really good one is going to come along and make it all worth it. But you won't be able to experience it unless you stay open and honest. So tough it out!
Lastly, try and stay as present as possible throughout your years here. Stress is inevitable and trust me, you'll definitely have more meltdowns than you can count, but try to enjoy the smallest bits of good throughout your days. As cliche as it sounds, four years does go by super fast. Don't look back at your time here and only remember the days that sucked. Take in every aspect of this time and learn from it. Grow. That's the whole point, right?