I went through 2+ years of limbo like this. It was a living hell. I got sick of it, found my strength, and filed for divorce. Her getting served snapped her out of her MLC funk and she realized what she was going to lose. I went from the pursuer, to the 180 guy moving on with his life, to the pursued. We're still together because I refused to sit around waiting for her to decide.
It's also very important for you to become the absolute best version of yourself you can be. Let her see the improvement. Let her see you getting out there, being happy, and having fun without her. It works.