Why is she bothering?

Ok so I broke up with my ex like a year ago, and since, she has contacted me at least 7 times via Facebook (most recently during this week). I've not once tried to make contact. When she does I act polite and civil and answer her questions how I feel I should (she's always asking how I am and what I'm doing etc etc). Then as usual after a long convo where I'm the last to message with a question expecting an answer I get nothing, no response till the next time she decides to inquire bout my life.

Why is she doing this ? It's beginning to annoy me
Why is she bothering?
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