Bolded line is fair and something I say when talking about how shitty women can be. "Men are at least as shitty, but I'm not fucking men so it's not relevant to me".
As for your story, that's insane. Not saying you're lying at all, but there's obviously more there. She clearly was not innocent and virtuous. How can you even call her that if she gave her number to a guy at a bar, with her fiance there? Out of the 100-200 girls I've been out with, I've only found 3 to be extremely high quality. All 3 of those girls didn't drink, nor did they go out much. So already I likely wouldn't find this girl as great as you claim.
Sometimes even "good" girls can cheat in very specific situations. Maybe their man hasn't touched them or made them feel loved in a long time, they have a long slow build up with someone from work, etc etc then one night "it just happens"....still super shitty but more explainable. No good quality girl in a relationship just hands their number out at a bar to another guy and starts sleeping with him, complete contradiction.
People are good until they are not.
I've undergone a series of personal events that have completely changed me as a person.
For the longest time, I was one of those 'save it for marriage' Christians. After having two older friends commit suicide after getting destroyed in divorce, I had my eyes forced open. While I'm still a Christian, I no longer hold those other views.
Then there was that whole debacle last year.
Point is, while devastating traumas can certainly change people... So can even the smallest thing.
Locking yourself into 'lifelong' contract with someone is failing to take this into account.
People change.
There's the saying - 'Women marry men hoping they will change, and they don't. Men marry women hoping they won't change, and they do.'
Think of it this way - the woman you are with WILL undergo a significant change. All women do, it is inevitable.
Of course, I am referring to menopause. I remember my mother going through it, and she was insufferable.
I had a very close friend get hooked on opiates after he had a health crisis. He became a different person, and we no longer speak because he can't be trusted. He was a top notch guy.. Happens all the time.
Do whatever you want, but know that as a man, the government only wants to exploit you. You are chattel to it... Just a work horse to be used until you break down and return to the ground - whereupon another man will take your place.
That is why the government made alimony no longer tax-deductible to men (the payor). The government realizes that men save their money, and women spend their money.
Therefore, in order to keep the house of cards that is the American consumer economy afloat, you need to transfer the money from the savers to the spenders.
That's what this is all about.
Be with your woman, and love her for as long as she is yours. But stay away from the government.