I went through hell when I discovered my ExH's affair.
I never thought he would ever do this to me. I always thought we had a loving, respectful marriage until he met this (younger) woman at work. He began messaging her a number of times every day and weekends. and then this developed into calling her to and from work every day. I became suspicious and looked at the phone bill to discover this. I confronted him over this and he began using WhatsApp instead. I would see him online at all times of the day and night.
Then came the textbook "Script" behaviour, shouting at me over silly things, accusing me of all sorts, making out I was paranoid. He even became physically aggressive, shoving me and launching my car keys at my head because I had parked in the driveway. I went covert and looked at his laptop whilst he was at work. I discovered that he had ordered a framed copy of one of our Wedding Poems, "Scaffolding". He had bought it for her for Christmas, thinking that as they both worked in Construction, it would look like he was romantic! (He wasn't very bright!). But who the hell gifts someone their wedding poem!! He arranged to have this delivered to his parents, which is what made me suspicious, as gifts for me had always turned up at the house. He was even chasing it up before Christmas. He was also arriving home with silly, inappropriate gifts in his workbag.
We had a holiday booked for Christmas and we went on it, he didn't want to go as he didn't want to be away from her. It was awful, it was like there was this awful atmosphere, and he kept disappearing off with his phone to call her on WhatsApp.
When we landed, he immediately called her. it was vile.
I had to leave the home as his parents owned the house, it took 6 months before I left, and his behaviour very nearly broke me. It was all my fault, I didn't keep the house tidy, I had gained weight, I didn't work hard enough (I was the breadwinner working long hours), I was thick (I'm a Graduate)
I wrote to his Mum and told her about her Son's shitty behaviour, she sided with him and became very aggressive towards me turning up at the house at all hours being abusive to me.
I won in the end, though.
Firstly, whilst going through the shittiest six months of my life ever I would regularly run his toothbrush under the rim of the toilet! (I would snigger about this)
Secondly. I wrote an anonymous email to his employer informing his line manager of the fact that they were carrying on, and they were separated shortly after!
Thirdly. I was determined to conduct myself with dignity. I sent one text to the OW. With a picture of our Wedding Poem, saying 'had she seen this,' along with the explanation of how I gifted it to my Husband on our Wedding day. (Nothing screams romance like being given a gift that was something given by your boyfriend's Wife!!). I also explained the true meaning behind the poem!
Fourth. I took everything from the home that I had paid for. Which left him with an old dining room table, and a Sky box (No TV). I even took the plates, cutlery, white goods, everything. I had paid for it, and there was no way he was keeping it. He was left with nothing.
Fifth. I left the house a day earlier than planned as his Mother wanted to be there. She loved confrontation and aggression. I therefore denied her this opportunity. He was at work, I wished I could have seen the expression and anger when he arrived home to an empty house devoid of any furniture !!!!
I'm three years on from it all now. I'm much happier, have my own house, my beloved dogs, even though he tried his utmost to keep one of them and even tried to buy him from me. (That was never going to happen. The house I left, owned by his Mother, was a shack; it needed so much doing to it, holes in the ceiling, a 1960's kitchen, and she refused to do any work on it despite taking rent off us every month. My new home is lovely, modern and somewhere where I'm proud to show people around. I've nearly finished another degree, which I am studying for part-time time and am an expert in my field professionally.
It does get easier. As for him, well, she's welcome to him I don't know if they're still together but she was much younger. I am hoping he's a 55 year-old Dad. With a very small pension and having to do physical work into his 70's to provide! We never had children, thankfully.
Looking back, I'm glad I didn't go guns blazing with the OW, she has to live with what she's done and for that there is karma.
Take time for you.