I'm so sorry to hear about this BS... I think Lisa's observation is very perceptive. I also think that IM conversations in general are sort of distorted... they are like conversations but missing all the nonverbal information. If your H is in MLC, isn't this behavior also "normal"???? Even if it is still infuriating???
I wonder if sleeping with you brought up a lot of emotions for him and he is distancing because of that.??