John Watson act like he does not feel attracted to James Moriarty

When John is walking with Sherlock to a secret place to meet with Moriarty, because nobody knows that Moriarty is still alive, he heard a familiar Irisch accent, John felt something really strong what he could not describe. Moriarty looked John in the eyes and smirked.
"Ahw Sherlock, could you not let your teddy bear at home"
"No Moriarty, John is a very good doctor and not only a doctor but also a really good detective. And I do really need him with me with a psychopath as you near me."
"I rather be a psychopath than a 'stupid good doctor' I am sure he does not even know how to place a path on a wound."
John felt that he was really getting angry inside. Who does Moriarty things he is?

Sorry I am not a native English writer, so I make grammar mistakes, feel free to correct me.