No, I was lucky in that. I did bring it up with BF, told him that I would understand if it was difficult for him to let OW go. He insisted that it wasn't so I just had to take him at his word. I'm sure it would have been infinitely more difficult had she still worked with BF (she got laid off in the middle of their affair, I think it's karma).
BF is definitely the type to make a decision and stick with it. That's how he quit smoking both times (he took it up again with OW, ugh) so I tend to believe that's what he did with OW. But of course I still had MANY moments of doubt and continued to check his mobile phone and email accounts.
Withdrawal from an EA/PA is common and can be compared to withdrawal from any addictive substance. That's why IC is often recommended.
Are you reading the threads in Piecing? There are stories of the WAS going through withdrawal and how people dealt with it.
If you love somebody, set them free. http://tinyurl.com/2empx2g