Right now you are your WW buddy. She feels comfortable with telling you she has OM. You has lost respect for you.
In order for you to regain that respect you have to stop being your WW buddy. Cancel this dinner date. Go do you'll taxes, and act as if nothing is bothering you. This is a chance for you to show her your strength. Don't bring up OM, talk about the M or the R.
Keep the meeting about business. When you'll are finished tell her you have plans, you end the meet up. Get up and walk away. Let her see a strong reframe walking out of her life. Give her a glimpse of what it feels like to have reframe not be there for her anymore.
No more weak reframe. No more reframe allow disrespect. Respect yourself and she will have to do the same.
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.