You are correct, things will continue to be difficult as long as she is with OM. You can't control that. You will never talk her out of being with OM. I know it's hard, the hardest thing I've ever tried to do (notice I say tried b/c I don't think I've been successful yet), but you have to lovingly detach and stop pursuing her. I have tried it and it's true - the more I pursue, the more H pulls back. Also, don't bring up OM any more. She needs to see changes in you that make you more attractive to her. But most of all, you need to make changes for you.
How long you stand or if you file, that's up to you. It's your power. You are in control. Nobody here will tell you if/when you should give up. Think about what you want for yourself and what you can and cannot take. Then work toward that using the DB principles.
I know it's hard. Hang in there.
Me 39 H 38 T22/M15 S11 S7 EA Confirmed 3/11/09 Sep Weekdays Only 4/09