I don't feel like fighting for M anymore. The whole situation just [censored] but I'm going to carry on and hopefully I'll be able to find a relationship worth fighting for.
OK, sit back and take a deep breath! Right now you're talking from a position of anger and frustration. And that's OK, that's one of the purposes these forums serve- it lets you vent to people that aren't directly attached to your sitch. But you do not want to take action when you're in that place. Your emotions are still raw from W's disclosure that she wants to move out and go to OM. You're going to need some time to process this info and come to accept it. So give yourself some time and space. Meditate, go for a walk/ run, ride a bike, whatever you do to help yourself think and recenter.
Have you read DR? Have you read the sticky at the top of the forum with Sandi's DB 180 tips? If not, read those right away. Remove all pressure from your W. Do not initiate any R conversations. If she wants to talk then just listen to her and validate her emotions.