Simple communicate effectively, leave engaging comments, read peoples hubs & many of them, message someone who has communicated with you frequently via your hubs or forums, and maybe one day, they might just consider becoming a friend of yours, a hub pal & not just a Fan looking to get traffic or something of the sorts.
You might actually do the same to someone, by considering them a friend of yours on Hubpages, someone who you took a liking of their writing style, and communicative skills. Networking is what we are all here for as well, besides just writing. It's like a writers social network here, you know. Great Question by the way.