I'm just over a year from discovering my dh's EA - the fact that they only ever had sex once after I'd discovered his and not before is irrelevant. It's no less an affair just because they didn't have sex. In fact I tend to believe that an affair that is simply about sex may be easier to come to terms with than an affair in which emotions and feelings are so important.
I'm now reading the Shirley Glass book that WWIFN has recommended on lots of occasions and I'm finding it very helpful. It's validated my feelings and I now know that how I was feeling at the time - and since discovery - is pretty normal.
I now also recognise that my dh behaved in a pretty stereotypical way in the manner in which he tried to handle his EA.
It's been a really, really hard 14 months. We did separate because I didn't want him round. I never stopped loving him but I didn't like him for a long time. Even now there are occasions when I don't like him.
But I do now finally feel that I'm turning a corner and I'm starting to relax a little more and even to believe in him. I don't, as yet, fully trust him and I do still question him quite closely. I need to know his movements when he's not at home - it used to irritate him but now he understands why I need to know and he's doing everything he can to reassure me.
Our relationship is much better now than before. We're closer, we talk more and he's become a far more involved father than he was before.
Maybe finally he's starting to grow up.
Don't rush into making any decisions. Take your time, allow yourself to grieve and don't be afraid to be angry with him. You have the right to be.