Only you can decide what is best for you. I don't say this to quell hope, however I feel it necessary to toss this out for thought. Statistically, most affairs last 6 months-24 months. Only 5% lead to marriage. I know a few of those 5%. While I'm certainly not advocating divorce (I think it's way too easy), banking on a affair ending within x time puts you in a very precarious place. You need to love your life and not check off dates on a calendar. Think about it.
Focus on your well being. Let your W walk her journey.
3 kids BD 12/15/13 (IDKIILY. ) Rope dropped Cirque du Soleil style D final 9-9-14 "Some people are born on 3rd base and go through life thinking they hit a triple." Barry Switzer