Hi Kaya,
Great question. I assume you know the 90-9-1 rule. Of your visitors, 90% will read the post, 9% will leave a comment now and then, and 1% will be loyal readers and commenters. Sounds pretty discouraging, huh. You just need to know that way more people are reading your blog than commenting.
That said, if you are like me, you crave responses and interactions. One thing I have found is that if I comment on other people's blogs, they tend to visit mine and leave a comment. Of course, if you keep commenting and never get that blogger to visit your blog, you might not be so eager to keep returning.
I have stopped measuring the success of my blog by how many comments I get. (It was a slow, painful process to reach that point!) I can see by my stats that I am getting readers and so I figure if people are reading what I write, that's worth something.
Hope this helps.

