When you W comes back to you and shows genuine remorse, then its time to start backing away from the LRT. And even then, you should do it SLOWLY. One of the worst mistakes you can make is taking he back too quickly.
Me: 48 y/o W: 47 y/o Together: > 20 yrs BD: Dec '15, then S 2nd BD: Mar '16, then I filed for D April '16: started piecing