I invite you to check out LTA forum in "I can Relate" - all people there have been dealing with long term affairs.
My WS's affair was 1 1/2 years in addition to whatever emotional inappropriateness occurred prior to the start of the physical relationship.
I know after DDay, my WS missed OW. Given my delicate emotional state, he didn't belabor the point, but I got the feeling he missed her & also feel it is normal for it to take a while for the feelings to dissipate.
My WS did break contact with OW almost immediately. Then he didnt, then he did, etc.
Obviously, our reconciliation didnt work out - so I cant give you any other perspective.
I can tell you here he is, 4 years after DDay, wanting to reconcile with me while still checking out and posting on OW's facebook page telling her she is hot...
Anyhoo - check out LTA.