There is nothing wrong with being a reader. However, the internet does not offer a great variety of ways to communicate. The easiest way in fandom is to comment and post. I would not defriend anyone for simply not commenting enough but I can understand that people may feel otherwise and think that communication is a little one-sided. Journals, fiction, art etc. strive on interaction between users.

As bad as it is, fanfiction.net offers a good way to see how many people clicked to read a story. I freely admit that it is disappointing to work on a fic for months and then get 5 comments while seeing that 500 people clicked to read and some even put one on author or story alert.