Confusion

We had a house showing last Wednesday.
Wednesday afternoon - we get an offer
Wednesday afternoon - we counter
Thursday morning - the guy rejects our counter
Thursday morning - we counter again.
A
Whole
Week
Goes
By
And
NOTHING.
Today - our real estate agent calls and says that the guy isn't going to respond to our counter because he wants a second showing SOMETIME, nothing scheduled yet, just SOMETIME.
What?!
Why offer if you're unsure you even want our house?
I have lived in anxiousness all. freakin. week.
Boo.