it's such an interesting thread for me as I've recently discovered something I wish I hadn't
I discovered that my dp (and I don't want to put too many details on as I've name changed for this) was living with another woman when we first started going out. I totally, randomly discovered this years later. At the time, I knew he had lived at X address. Around 6 months ago, I had to look up our title deeds for something and realised on the land registry website, you could see who owned the property from the address.
I honestly, to this day, don't know why I typed that address in but I did and a woman's name popped up. I then recognised that name as when we had first met, her name used to pop up on his phone the whole time and he had told me it was an ex of his he was helping with a commercial transaction.
I confronted him and he made up some half arsed story about us only overlapping for a few months and he had already broken up with her. But I could see he was lying and I pushed and eventually found out that he had actually been seeing her around a year into our relationship (and their relationship lasted around 2-3 years, he started seeing me in the last year of it) - in fact it looked like it only stopped just after he moved in with me.
I am still in shock today. For me it's the deception. The fact that for that whole year he completely and utterly lied to both me and her (she had no idea I existed). And I suppose it's the deep down horror that if he was capable of this once before, who is to say he won't do it again.
I'm not sure if I want to continue but I don't have the benefit of a 40 year marriage just a relationship under 5 years. The problem is if you'd asked me before this, I would have told you how happy we were. We are about to buy a house together, he's spoken about getting married. I feel like someone's ripped the carpet from under my feet.
I wish you luck in your decision. There's an interesting article in the Mail of all places talking about how infidelity in some cases does save marriages (though not sure how). I've been divorced before and it's such a horrendous process, it does make me feel more likely to want to sort things out but I think ultimately, if you can never trust them again, then there's no point continuing and I guess you have to decide if you can do that....