this is only my opinion but i wanted to add after sitting here contemplating my feelings, i found a huge difference between the grief of infidelity to the grief of death.
its only been 6 months since dh changed by life with his selfish act and it has been 3 months since dad died.
at first i thought the grief of death was worse, at least i could still touch and see and speak to my dh whereas i couldnt my dad
but.... as time goes on i realise i miss by dad like crazy but it is a completely different grief, i am sad he is not still here but i dont have the feelings of rejection, betrayal or at times hate, self worthlessnes, his death did not cause any of these emotions which i feel the grief is easier to handle.
these emotions cause such an overwhelming power, they knock you right over. they are simply caused by a loved one being selfish and horrible.
maturer, this morning during yet another fight with dh he had the audacity to say i contributed to him cheating on me. because i kept nagging him. i know i nagged - just to spend sometime with me,to come home instead of working and never being home, i was lonely at home with our dd who was 18 months and i was pregnant. and i showed him no love (he was never here!) - it hurt me again to the core that he could lay any blame of his actions on me.
it is unfair how so easily a man can create our pain, they need no advice how to do this. but they can never take it away or say the exactly right thing to make the pain disappear forever.
in my case, i think dh is sick of trying, i think i have gone to the point of no return in our relationship. but i guess thats life.
you're one of the strongest and most helpful of mumsnetters. i wish i could offer some advice, i'm sorry.