I have used discussions about our daughter as an excuse to contact my SO. It's been less frequent in recent times...last night's text messaging was the most I had done it in a while. She is usually the one to call/text me. She even did it tonight to say good night to our daughter.
I agree with you about my reasons for not wanting to get married being lame...and I now have to live with the possibility that I may never get to rectify the situation.
Some of your words actually sent chills down my spine, as they were the exact things my SO and I talked about, some of which she even said word for word, in our discussion today.
While my SO is akin to a WAS, know that I'm not blaming her for everything. While she made the choice to leave, there wouldnt have been a need for a choice if I had "woken up" to the reality of things sooner.
And from your closing thoughts, which are definately clear in themselves, it would appear you are in support of the "after the last resort" technique.
If the situation with the OM has indeed become a PA (which would likely destroy me given that the mere thought of some other man kissing her, let alone being intimate with her, turns my stomach) then that is my only option.