OP I get it. Been there, got the t-shirt.
Thinking about his wife, thinking what an awful person he must be, thinking he must be a liar and you're naive is all bullshit. It doesn't help, but goady posters on here love to tell you you're a fool and just a shag.
The reality is people just don't often risk everything for just a shag. And if they do, it's one night stands or quick dalliances. They don't maintain the affair for months or years unless feelings are involved.
Does it make it better? No. Does it make it easier? Hell no. But the idea that everyone who has an affair is a serial liar and cheat is just stupid. And proved wrong on this site daily.
I was 1000% convinced mine would work out right because I knew him. And none of my reasons proved wrong, but I was living in a fantasy world where we could just be a happy family after the fact. In the end, the guilt of what it would do to his wife and children was too much and we broke up. He spiralled from a mixture of guilt and being unhappy without me and is now severely depressed which is impacting on the family he tried to protect (albeit late).
I did the same, came very very low, and though better am still not over it. We also can't go NC due to work though thankfully I have moved jobs but we still cross paths.
We were together a year and broke up
4months ago, and I don't see myself getting over it anytime soon. People talk of limerence and fantasy but I fell in love with this man and still have to grieve for it all.