burnout02urza said:
Bearing in mind that not everyone's relationships and values are the same, I don't see how you can come to the conclusion that specific people, that you presumably do not know and know nothing about, is cheating on the OP, or at least wanting to.
This being said, I would have to side with those encouraging extreme caution. And annoyingly I fear that I am about to undo my argument above.
Anecdotally I was in a similar situation to yourself once. My fianc? wanted an open relationship, but I did not. I pondered for many months about whether or not I could bring myself to be OK with it, and eventually decided that I couldn't bring myself to accept it. She was of the mindset that she could differentiate between sex and love. And that's fine, some people would agree with her. That's cool. I did not. For me, sex is an important part of a relationship. It's more than the physical act, it's a deeply personal thing, a connection between two people. And I was not OK with sharing that with anyone else. I didn't want to picture myself with anyone else, and when I thought about her and someone else it made me upset. Angry, even. I'm sure there are some who would sympathise with her, OK sure. I don't think I was the bad guy in this story.
Anyway, ultimately, she wouldn't budge from her position, and neither would I. We broke off the relationship, I moved away, and then just as I was contemplating whether or not I'd made a terrible mistake in leaving her I get a call from my now ex-fianc? who, wracked with guilt, admits to having cheated on me while we were together.
Was she wanting an open relationship because she wanted to cheat? Was she already cheating at this point and wanted an excuse? Probably. But the point is less about the outcome of my failed relationship and more about the personal decision that I came to when I realised that I was not OK with an open relationship. And at the end of the day, it's a personal decision for you too. Nobody on here can tell you what is right, or how you should feel one way or the other. We can provide you with our thoughts, our anecdotes, our warnings, but ultimately it's your life, and nobody knows you as well as you. Be happy in your decision, whatever it is. Have no regrets.