Some thoughts, LL - First - have you read The Five Love Languages? Do you know your H's love languages? Are you speaking them?
Second - although snooping is usually a bad thing, in this case, it might be good to find out whether he has resumed the affair (or started another one).
Third - are you GAL in a really interesting way? Have you discovered your passions, taken up an interesting new sport, whatever?
Fourth - do you have a plan B? If you found out tomorrow H had been continuing the affair all this time, or whatever, what have you been doing to get yourself closer to a position of financial independence and strength? Seems to me, when you feel safe and secure in the sense that you could get by without H and have a fabulous life of your own, is when the WAS seems to wake up and notice.