Cut contact down to bear minimum... ZERO if you can pull it off. Have friends and family pressure your H to return to the marriage. Part of that pressure would be urging him to consider you may be willing to take him back. Have friends and family do your "pursuing" for you.
But they have to present it as you "may" take him back... not "she's ready and willing"... if he hears that he won't bother...
He has to hear there's a window open, but it is closing fast... and the clock is ticking...
AND then he hears that OW will never be welcome in their home etc... both those points should give him a nudge... the more people he hears this from the better