That long breath was indicative of emotions far greater than annoyance. Anakin had two options, he could call his friend on it (why would Obi-Wan come to visit him if he was this mad at him?) or he could ignore it and pretend, like Obi-Wan seemed to be doing, that it didn’t need to be addressed.
In the end, Anakin chose direct confrontation; the tension would just keep mounting otherwise.