you are not sensitive; he is offensive. Dropping the rope and walking away, maintaining the high ground, means he gets less and less out of baiting you. Expect the attempts to increase for awhile as he gets frustrated that you're not biting. Don't show him any emotion. Gradually, he will have to find something else to do.
(((Hope)))
When the men on the chessboard Get up and tell you where to go; And you've just had some kind of mushroom And your mind is moving slow; Go ask Alice... I think she'll know.