It has been just two months since the breakup of my marriage of 25 years. Just a couple weeks before she left me for the other guy, ( I'll call him #3) he told me that she had been raped by a friend (#2) of the family three different times during our marriage. I confronted #2 and he said it was consensual. Not too long after that, she admitted to me she was having sex with #3. For a guy who has never been unfaithful, and never had sex with anyone but my wife, this came as quite a shock. It has been hard, and within a week of her walking out, I filed for legal separation. I know that someday the pain will go away, but I couldn't deal with the situation, so I let her go. We have two boys together, and it is tough to take her calls when she wants to talk to them.
The best thing to realize is that if a person is going to be unfaithful, there is nothing you can do. The only person I found I could control is me. I also have to learn to control my thought patterns. If I dwell on what happened, I get really depressed. So, I had to train my mind to immediately think of things other than that terrible situation. I found a great way to rid my mind of the negative is to pray. You may not be religious, but some good advice I found is to meditate on things that are true, things that are pure, things that are noble, things that are lovely and things that are praiseworthy. Works for me.