It sounds as if you want the affair to stop because you know it’s jeopardising everything good you have in your life. So first things first. Change jobs. Your boss should write you a nice reference. Find a job that will not bring you into contact with your old employer. Then tell him it’s over. If your boss gets arsey about you changing jobs then it’s very clear that he is no longer a lover but a workplace sexual harasser, who is using his status as your boss to keep you available. Hopefully he is not.
And there is no “can’t” about leaving a job. You have to do it, at any cost, if you really want the affair to end. You can’t honestly expect to stay around this man and end the affair. Either you wont succeed at all, or you will do it but get very badly hurt, maybe even in a way that destroys your professional reputation or your marriage. Yes, there is a price for having a secret affair with your boss, and when you want to end it changing jobs is part of the price. If that means a huge salary cut or relocation then those knock-on effects on your family are also part of the price of your secret affair. So you can't talk about no-one getting hurt, it's only a matter of who, when and how much. Compared to what could happen if you stay in the job and what will happen if you don’t end the affair it’s a small price to pay.
When you’ve changed jobs and stopped seeing the OM then it’ll be time to have a think about your marriage. Without another man to perk things up in your life, is your marriage satisfying in itself? Or are things missing? That’s where it gets interesting.
But you can’t do that until you’re no longer having an affair.
And the OM is telling you the affair is OK if it “makes [you] even happier at home providing that my husband and children always come first.” Well that’s wishful thinking. It’s not OK and you feel inside that it’s not OK – if you felt it was OK you wouldn’t be wondering if he was spinning you a line.
You are trying to avoid both feeling hurt (including the pain of losing your lover) and you are trying to avoid hurting other people. But this isn’t just about hurt. Let’s talk about damage too. Hurt comes and goes, but damage lasts. You might not feel hurt but this affair is clearly damaging your self-respect or you wouldn’t have posted what you did. As for other people, what people don’t know doesn’t hurt them, but it can still damage them.
Think about his wife. Maybe she knows and accepts. Do you think she accepts without pain or without damage to her own self-respect? How do you think “he’s only able to be nice to me because he’s shagging someone else too” really feels? Or maybe she lives in blissful ignorance. Then she’s feeling no pain but a huge chunk of emotional openness and intimacy simply doesn’t exist for her, an important part of him is deliberately shut off from her. That is corrosive over time. Or maybe his wife suspects something is wrong but has no idea what, maybe even now she is secretly blaming herself for his remoteness or berating herself for mistrusting him? Perhaps the uncertainty is quietly damaging her own mental health and he isn’t even aware of it. Well, his family are his problem. But everything I’ve said about his wife is true of your husband too. Your family are your problem.
And one other thing’s for sure - by leaving the OM you may hurt him but you will not damage him. He may even learn something useful from it, something about deceiving himself or others. Or maybe he will learn nothing and the next nice lady who turns up in his office will replace you. But by staying with him, you damage yourself and your own family.
So get your backside out of that job! Take courage, and get your own real life back.