I hear the term "chemicals" thrown about loosely, "she has those in love chemicals and it's clouding her brain", she once had those "in love chemicals" for you too, until you did things which killed the attraction between the 2 of you, aside from busting the affair what will your plans be to start flicking those attraction switches in the opposite direction?
Those chemicals & feelings are not fake, they're real. You contributed to this regardless if you know it or not.