I tend not to connect well to others offline, so there's plenty of room if the right people come along. I'm not shy, but my lifestyle, attitudes, and my interests are very different compared to those around me. I hate smartphones, I'm happy to chat to people from different political parties without fighting, I still read classic literature and classic sci-fi, and I love to write with no fear of rejection.
Online, there's room but not as much. I'm afraid of spending too much time at my computer keeping up with people miles away just to have something to do and not because we have a strong friendship despite the distance. Before you know it, a whole evening can go by posting on forums or replying to PMs, but you might not feel less lonely for it.