Some say high school friends don't last, but when you move away to college, those are the people you rely on the most. For the first few months, they are the ones you want to tell your exciting new stories and experiences to. They are one of the people you call after a bad day. The best friends you made in high school are the ones you knew everything about. You grew up with them; you may even know their grandparents. That was my situation! I was lucky to be blessed with such great friends, and parting with them was hard.
Starting out, you find it difficult to figure out what to do. You can't have endless overnights with your best friend back home anymore, and you don't know any of the people you're surrounded by. There are moments where you become worried you will never find friends as good as your old ones.
So to the freshman finding new friends, my advice is to keep calm and wait. It will not be the same kind of friendship as the ones you have cultivated over years. No one is going to be your best friend within a month of knowing them! It takes time! It takes time to learn what bothers people, what they appreciate, and how you can trust them. Rushing friendships is awkward, at least for me, it comes easier with time. You may feel like you found the people you're going to be closest with the first day, maybe in the first week, or in the first month. Some people meet their best friends through clubs, classes, or sports. Each person is different, and four years is a long time to meet people.
I've been lucky to find great, lifelong friends in high school and in college quickly, but it is okay to find amazing people later into your experience. It is a big world filled with amazing people. Your college best friend is out there.