What is second year like in terms of making friends?

Hi all!
I'm currently finishing up my first year at uni. I'd be lying if I said I didn't have a great time. But...looking back I feel i could've made more of an effort to be more social (I had quite bad anxiety at the beginning so this hindered me a lot.By the time I was comfortable with my housemates I feel like I didn't really bother to branch out.)

I feel like I have two best friends here, and a few good friends, and then just acquaintances I see around/ party with sometimes. Our third best friend had to leave suddenly so that has kind of made me re-evaluate. Sorta feeling like I maybe put too much into that friendship (when I feel like we might not even stay in contact.)

So I guess my question is this...is it possible, in joining societies and whatnot, in the second year, to make a close group of friends again? Or is it pretty much set in stone?

Thanks!