Right now, he is the one that hurts down in the deepest place a man can hurt and YOU are responsible. Right now, you are not entitled to an explanation about how he is feeling. From his message, you can actually gather a great deal of info about how he is feeling. In fact, he is so angry and hurt that when he does start to feel better, you will readily see it.

Be grateful that he is at least communicating with you rather than filing for D. If he wants you to be his personal cum receptacle, then be the best, most apologetic, most willing cum recepticle that ever cheated on their husband.