I'll agree with your points Heartbroken and Heywyre...I did nothing eggregious in my marriage either--I was and still am a really fantastic wife.
One of the deep truths of life is: sometimes it just isn't fair. Innocent people suffer at the hands of others every day. When it really comes down to it though, not letting go of what they did hurts us far more than the actual act ever can. What they did was not justified in ANY situation. Never will be. But we have to accept what happened and find peace with it. Doesn't mean we have to continue to stay in the sitch, but it does mean we need to let go of bitterness and anguish and find joy in our lives. Joy that comes from finding ourselves in the journey, not in the destination.
Did I ever picture my life this way? HUH-UH. But you know what? I like myself so much better today than I did when I thought my marriage was bullet-proof.