My h now tells his parents that he wants divorce. What should I do? Since they knew now, Should I ask help from MIL?
Definitely not. No matter how she's been with you in the past and what she says to you, too many of us on here have trusted in-laws with something and ended up with it getting back to the spouse. I did with my SIL and I know TryingToDo180 did with her MIL. You've heard the saying "blood is thicker than water".
Definitely do not involve the in-laws. That's a very bad idea.
Both 50 S14 M 16 yrs (his 3rd; my 1st)
ILYBINILWY - 24 Dec 2012 H moved out - 27 Jun 2013 Legally separated - 6 Sep 2013 Closing the door and changing the locks