There is a difference between that feeling of love and being "madly in love."
You are not quite sure how you got yourself into the affair, and even less sure about how to end an affair. You love your paramour but hate the sneaking and cheating. You vacillate between ending the affair and giving yourself totally to it. You feel intense emotions for your lover, but even as you tell yourself, or your lover, that everything is going to be wonderful, deep within a small voice says that it will not be.
Though limerence by its very nature is relatively short-lived (typically lasting somewhere between 3 months and 36 months) it is a very real and intense emotion/feeling. When a person decides to leave a limerent relationship, or if they are the one abandoned by the other, the emotions don't immediately disappear.
Most people have never even heard of the word “limerence.” But if someone has heard of it, they probably ignored it because it didn't seem to make any sense. Limerence is a feeling of being madly in love with someone. It is a euphoric sensation that has no comparison.
You suspected it long before you knew it for sure. Your spouse changed but you couldn’t quite explain the changes in a way that seemed to make sense to anyone else. You thought that you were imagining things, being insecure in thinking your spouse had someone else.
You probably never meant for it to happen. It’s not as if you went looking for a lover. However, once you fell in love with someone else other than your spouse, things got rather intense. You’re already in what some refer to as an emotional affair. Perhaps you've gone further and the relationship has turned physical.