The One, not the One-hundred...

A friend of mine recently confessed crimes of infidelity to his long distance girlfriend/fiancee. He was distraught about it, having just seen the "light" and realizing how wrong he had been, knowing how the trust was broken, and that he couldn't do anything about it. The scumbag's philosophy in this scenario would be "What she don't know, won't hurt her. He's dumb for telling her." To which I would reply, "Probably."
But of course the bigger mistake would have been the infidelities themselves. But I digress. The real issue that I saw was not a question of his question path of decisions, but more, his sadness about them. I asked about the glum disposition of my chum, and he replied that he was sad about cheating. I asked if she would forgive him, he said he didn't know. I asked if she seemed like she would, and he said yes. I then asked what there could possibly be to be sad about at this point, to which he rebutted, "I just don't know if she's going to want to get revenge." I was confused and asked why he would think she would want to. To which my blue brother replied, "Because that's what most girls would want to do."
This was the part of the conversation that peaked my interest the most. I  mean, it's not like he was just engaged to some chick he met on the internet a week ago. He'd known this girl for a while before he popped the question. So why ever would he group her in a way as to compare her to "most" girls?
The first thing I wanted to say was, you should learn to trust someone, and never bring your old baggage onto a new flight.  But another idea popped into my head, much more pressing.
No one should feel like they've "settled" after they've already promised the rest of their life to someone. People commonly use the phrase "measure twice, cut once", but it has never been more relevant than when talking about a soul mate. You never buy the cow before trying the milk. You never stick it in if you didn't sniff it first. You get the point. If you can't imagine, even for a second, that you could spend every waking moment of the rest of your life with the one you love, you either need to rethink some things, or slow it the hell down. The most important thing that happens to you in life is finding that one in a hundred. But you just make sure it's the One. Not the One-Hundred.