"If I haven't come across this board, I'd probably have forgiven her for meeting with OM and praticed more patience for her recovery."
First of all, you shouldn't blame the board. You haven't read the books so you are applying the DB principles incorrectly and are not taking the advice given in the context they are supposed to be taken based on the books.
"I'm now pushing her towards the OM and I have to focus on a future without her."
That was your decision. No one told her to issue her an ultimatum. That was all on you.
Could you have survived this? Absolutely. And you still can.
The bottom line is that what's done is done. She couldn't break her ties, and it's on her. What are you going to do with yourself from here on out? Are you going to change?
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.