Seconding this. The library was my best friend when I was still in school (I did not finish my degree but the field I am in was satisfied with what I'd accomplished). I made myself do most of my homework there and it's probably one of the main reasons I got as far as I did. My college had private study rooms with a large table and white board in them; some people would isolate themselves in there and use it for a large workspace for their own projects, but when I was in Gen Chem (that class nearly killed me), I was there with classmates most weeks doing study groups.

OP, if you are the introverted type, these informal study groups are one of the best ways you can get to know people imo. It's like the classroom, because you've all got the same class, tests, homework etc, but it's less formal and more social. It was my favorite place to share the weird ways I made the concepts make sense to me, and next to my professor was the best source of information.