You're right. It takes 2 to rebuild the relationship. Hopefully from a position of the 2 of you having healed or are healing yourselves. It takes 2 to rebuild, but it only takes 1 to end it.
Betrayal trauma is real trauma. PTSD symptoms are common. I've seen it called PISD by some therapists. Post Infidelity Stress Disorder. It's real, and it's not something someone just walks off in a few weeks, or even a few months. 2 to 5 years is the general timeline for most people to recover. Note that I said "recover," because reconciliation can be a lifetime work in progress. That doesn't mean it will always be a painful process, but it's something I think most couples will always be working on, even if in the background.
I don't know if anyone has recommended any reading for you and your WW. You do seem to have done some reading here on your own so you may have already seen these, but just in case I'll suggest "How To Help Your Spouse Heal From Your Affair" by Linda MacDonald an "Not 'Just Friends'" by Shirley Glass.
The former is a pretty short read. My wife and I listened to the audio version together and it wasn't much longer than 2 hours. It's short, but packed with info and really opened her eyes. The latter is a longer read, but also very good. If your wife is on board with repairing your relationship then she should be willing to read them both, tho I'd recommend the audio version of at least MacDonald's book and listen together. She does a really good job of explaining what you're going through and how long it can take to recover from infidelity.
I was just like you in that I didn't have anyone to talk to about this. Well, no one I wanted to talk to about it. The mix of shame and guilt I was feeling combined with the pressure I'd likely get from my side were 2 of the reasons I didn't. I have 1 good friend I confided in and he's been great, but these forums were a godsend. I'm really happy you found us. It helped me a lot just to type it all out and get feedback from others who really get it.
I think my wife was also hoping this would blow over in a few months or so, but between that book and her doing her own research she now realizes it's going to take more time than anyone wants it to. It's been almost a year since my d day, and it still hurts like hell. It took almost all this time just for the initial shock to wear off, and I still find myself thinking "I still can't believe this even happened." Since listening to those books (very early on) she's never hinted or suggested I should be getting over it.
[This message edited by Pogre at 12:28 AM, Monday, March 16th]