As you can see by everyones posts. Cheating(both parties involves) isn't ok for anyone to do. Women also need to start taking a stand against this behavior. Its not ok. I am glad the realist in you is stronger than the dreamer. Let's hope it continues to be stronger than temptation as that is the true test of someones character. Staying away from this man and any contact will make your life simpler(as you want it to be) if you want attention from unavailable men why not just go find a single man that is emotionally distant. There are plenty of them. Bars are great places to meet men like that. I do agree that figuring out how to stop being attracted to taken men is a wise idea. Work through whatever the cause is. Not asking him on walks is a great start to separating yourself. If you decide you are going to continue to maintain this relationship (even with all the reasons to just leave him alone) perhaps meeting his wife or even mentioning meeting his wife may help you. Then she is not this unknown entity that has no feelings. You may find out how in distress she is about her husband that may or may not have many female friends. She has more reason to hold on because she is married to him and doesn't want to divorce(for many reasons). Married people(men and women) should not have adulterous relationships. That's simple. Very very simple. No one here is sayoing you will for sure but it seem that your mind is already doing it. Trying to find any way to figure out how to make it ok. Don't listen to the dreamer. We shouldn't dream about hurting others. Once its ok in your head it will be easy to act upon it. That's what everyone is saying. We can see how close it is. Walking a fine line. I don't know if you Have to have contact(such as being a coworker) or if its all voluntary. I would unfriend him on fb erase and block his phone number. And yes tell him you feel its heading in the wrong direction and you don't want to be a part of it. Stay strong to not acting on the little(or big) voice in your head tempting you to do wrong. Get that help if you need to. We all need help with those little voices. Its perfectly fine. I think that's why you posted. I think you did want people to tell you not to do it. I think you know deep down that your friends are wrong. I don't understand people that have that double standard either. I don't think one person that posted does. This is such a touchy topic that people feel strongly about. Its hard to not get upset when you get an indication that someone has the potential to hurt others. Stay better than that.