Experienced DBers, what is my W going through? Is it a MLC and an A all wrapped up into one? And then dressed up as a separation?
I wouldn't necessarily apply a label like MLC. I think a lot of her behavior is uncertainty related to the affair. Should I be with GH31 or OM? I think she wants both of you as potential back-up plans should the relationship with either one fail (I'm personally very pissed at OM for his butting his nose into your marriage. He's a loser, and should she decide to be with him, you are better off without her and he's welcome to her, since she'll eventually cheat on him). She tells you as much...."don't get involved with another girl, what if I want to come back?" Your answer to that is, "if I get involved with someone else, then there won't BE any coming back." Not that I recommend that you get involved. What she is doing isn't fair to you. I'd make sure that she's willing to actually commit before I'd open my door to her again.
You cannot be lonely if you like the person you're alone with. Dr. Wayne Dyer