Some people don't even find good friends at uni until the second term. I know I didn't. So you don't need to worry about it. People are still moving around groups of friends in the first term so I doubt if you've missed much!
And here's another piece of advice: By the end of the year, you probably won't speak to half the people you spoke to in the first term. So, just take things as they come and don't stress too much about it.
Also, it's good to be on your own sometimes.
And, attend society events because that's where you may find your next best friend!