What does it mean when someone never asks you a question?

Does it mean the person isn't interested?  Is introverted?  Wants you to volunteer all information because the person can't be bothered?

I'm sure it could be any of these, or one of a hundred other reasons.  But I always ask questions, I'm super-curious all the time, and I wonder whether I should stop asking questions of people who never ask me anything.  It's kind of weird and intimidating.  Are they giving me a hint?  Shut up, Wendy.

Here I am, asking lots of questions.  Heh.

I had a nice weekend, by the way.