Clearly he's not imagining that he's calling Mojo more than she's calling him. And there's only one reason why Person A does not call Person B. Because Person A does not want to talk to Person B. For a variety of reasons, all of which IN THIS CASE are irrelevant.
I say kick this guy to the curb, Mojo. If he's insecure now, how about when you refuse to marry him? Hmmm?