Yep. That was the way it was for both of my previous two roommates. Got along, and talked sometimes, but kept to ourselves for the most part. A lot of times, we would even spend the entire day without saying a word to each other.
I think this happens with a lot of people because it’s just easier to be roommates with an acquaintance than a best friend. Some people want to just lay down on their beds and relax a bit after a long stressful day of classes instead of chatting with a roommate (or anyone really), don’t want their roommates distracting them while they’re trying to study, and in general just want their alone time. Before I went to college, I imagined that my roommate would become like a BFF, but now, I’m kind of glad we did end up being more like acquaintances than friends because I really liked having my own space, and I especially liked not having to answer a bunch of annoying questions like “How was your day?” when coming home from classes for once.