I just want to give the other side to you all and what you may stand to lose. My ex had an affair when I was 8 month pregnant which continued to when the baby was 3 weeks old. How any man can cheat on a pregnant partner and how any woman can shag a man when she knows he has a pregnant partner is beyond me, lowest of the low imo. He had pushed for the baby, not me. He has since admitted he just did it because he thought he wouldn't get caught.
Anyway, when I found out I told everyone. His family did and still do stand by me so he lost the respect of them, his friends and his colleagues as did she as they worked together. He actually moved jobs. He still begs me to come back 5 years later, patheric really. His AP got pregnant, it wasn't his which we know for sure as her ex asked for a dna test (I'd let him know about the affair, apparently she still blames me for ruining her life but me and her ex remain friends.
I've been through a lot, sexual abuse and rape as a child and from my (different) ex. Plus being beaten by him to within an inch of my life. But the affair hit me like a ton of bricks. I felt the same amount of trauma as I had totally trusted him. I will never fully trust anyone again.
However I am happy with a new life, partner, career and baby. Even stronger than I was before. He is mainly miserable as everyone knows what he did.
And those of you who think what they don't know won't hurt them...the not having proof but suspecting (you can just feel something is wrong) was one of the worst parts of it. Just block them and delete them from everything so you can't contact each other. The pain is nothing compared to what your partner will feel. I'd recomment telling them for their sake. That probably won't appeal to you since you've no regard for their feelings but self preservation might....my relative found out 10 years later, kicked him out and he lost everything. Even his kids don't speak to him.