Originally Posted by HotPepper
And I saw the look in my current SO's eyes when I was planning on leaving her 2 yrs ago, I was already starting to see someone else (bottom line - I cheated on her) but she was devastated and I couldn't stand myself for hurting her. I went back to her. I always think of myself as tougher then everyone else. But that's not true. I know that i need to lead my life on my terms and have like-minded people with me on the journey.
Did you ever tell her you cheated?
And another thing. Any talk of poly might be a trigger for her, as in, she might recall that time 2 years ago when you tried to break up with her. Just a guess.