Asking roommate to switch rooms?

I really do not like my roommate, and I don’t think he likes me that much either. We barely talk, mainly just a simple, “hey,” if that. Sometimes we go days without talking to each other, and he’s very rude and obnoxious. He also always has his headphones in, and ignores me every time I actually try to have a conversation with him. I think he is kind of friends with another kid in our dorm who doesn’t have a roommate. I really want to see if he thought about switch rooms and going into his room, but I don’t even know where to begin to ask him about it.

Why would the other guy want to give up a single?