We are almost exactly a year out and I had a huge meltdown this weekend. I wasnt abusive, but I cried an awful lot, asked him how he would feel if a few short weeks after he proposed to me I went and fucked someone else. He hates being reminded of the act itself, says I "throw it in his face". I suppose I understand his frustration when we are trying to move on, but sometimes the pain is so huge that I need him to see how much it hurts.
I truly believe that this loss and pain of infidelity is very similar to the grief you experience when someone you love dies - because really, that is what has happened. And as with grief (and I have lost someone very close to me) with time you learn to live with it, but every now and again the pain resurfaces and it hurts as much as it did the first day.
if your H does come back and you do want to continue to R, apart from MC and IC, I would suggest discussing a strategy of how to deal with these bad times. because, to be realistic, it may happen again.
I wish you all the best, and I am sorry that you are hurting.