First day of school coming uppp

I’m going into sophomore year and last year I switched schools like half way through the year and I had a ton of close friends but when I moved I had no friends and became kind of loner. After making a good group of friends shit went down and we all kind of just dropped each other, just from not talking mostly and different life choices. Now going into the next year I’m super scared I’m just gonna be alone with no friends and I tend to get shy and be super pessimistic. Soooo basically I just need some tips on looking for good friends and being more open I guess? Anything can help at this point lol