Really hard to say whether its you or him, or if he's just depressed. Not really enough information to go off of. And I'm sure most of the people here would hate to give you advice that could potentially be wrong.
To me it sounds sorta like a case of depression. I know that almost perfectly describes me when I am feeling down. Maybe he is just sick of the same ol thing every day? I have no clue how or why this happened, but whenever I talk to my SO on the phone, it just bothers me when she says "hey babe". Why? I think it's because I've heard that same exact phrase starting every phone conversation for a year now. When I was depressed it would magnify the dislike into disgust, and I would almost feel physically sick just because I heard those words. I finally got up the courage to tell her how I felt about those two words, she started saying hello to me with more variety, and all of a sudden I didn't have any odd issues like that any more.
I can't even begin to guess if that helps or not, but I hope so. :)