Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
Perhaps he is so numb to any level of empathy he no longer feels any.
It's good to write things down but I would not suggest bottling things up because you don't want to rock the boat. If you are feeling down it is his job to help you in any way he can because he is the inflictor of this pain.