You just keep doing what you are doing. Very soon, you will find that those early friend groups are probably going to morph, dissolve, and coalesce into different friend groups. You are obviously doing things right. The people who are really going to be your friends will become apparent soon enough. Even then, it’s not going to be stagnant. My D is a junior and found a solid group of friends in her first year, but in sophomore year, there were new people she started being friendly with. Now, more than half her group is studying abroad. She said at first it was a little unsettling, but she is totally fine with it because, unsurprisingly, she’s getting to know a bunch of people she didn’t know so well before. It turns out that one of those people is doing the same study abroad program as her in January, and now she will be hanging out with a friend for a few months.
Making friends is a life-long thing. There will be a few people in your life, apart from family, whom you will become very close to. If you are lucky, you will remain friends with them forever. My best friends are still three women I met when I was about 23 years old, more than 30 years ago. Remember that you don’t need to be friends with a hundred people. You just need a few friends you are comfortable with, and the rest is icing on the cake.