Let go of this OM issue. The problem isn't him it's your WW. When you talk about him you give him more validity, you make yourself look weak. Do only the things that make you look strong.
Most Waywards think that the other person is meant for them and that all their problems will be fixed by moving on. But when reality sets in the LBS is strong and made all the changes that the wayward wanted. They move on to this new person to start over and find out that the other person isn't perfect and nobody is perfect including themselves. While they are on this destructive path we as LBS learn, reflect and grow, while they are doing the opposite.
I say all that too say. Be strong, give her space to realize, what she is giving up. She can't see your changes if you are constantly perusing her. Dont talk about the R or M tomorrow, she will see strength in you if you don't bring up the M or R (it will be hard as he'll, I know). Keep everything about the numbers. Don't try to keep her around. Plan something to do, so you have an exit plan. Like plan to go to a movie that starts a hour after the meetup between you two are suppose to happen. By doing this, you don't linger and you can say, "I really appreciate the talk but I have plans in a little bit, if you don't mind I would like to start getting ready. If theres anything else you think we missed just text it to me.".
This also shows her that you won't be waiting around as a second option. I know what you are thinking want this push her further away? Maybe, but think about what you have done so far, has that kept her with you. No, so it's time to try something different. Like AS says you have to push the AP and the WW closer together, so the WW have to live outside the fantasy and deal with real life issues without the LBS in the picture.(a scary thought right). The only thing that can break a fantasy is reality. You pulling away is a wake up call and a part of reality. The person that had their back far so long is pulling away and this new person has to pick up all that slack.
Don't bring up OM or how you knew she was over there.
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.