Look .. this is brutal .. MLC or not .. the approach is very much the same, only difference I feel between the two would be endurance.
Regardless ... sorry you are here as its tough. Like Toots said .. read the 37 ... GOLD in those hills
Another thing I would do if I were you ... Nuke FB for now, NOTHING good comes of it ... trust me, all that time spent basically 'stalking' and getting yourself worked up is counter productive, like Toots said .. you have to take the focus off H and place it inward ... dropping FB will help, and I know this is a shock .. FB will not implode without you there. Dump it for a bit till you are stronger.
Another good practice .. DO NOT initiate contact ... let him go for right now, he fired you ... and you would not go to work after they let you go. Important things about the kids ... ok .. but WATCH that ... simply temp checking by using the kids as an excuse will make him run further ... "S5 has a Dr appt concerning his big pinkie toe at 3" is ok ... But do not TM about "Little Sara looks so cute with blueberry jam on her face"
This is the hardest thing I have ever had to do .. but the wonderful people here will and can walk you through this ... just remember its about YOU ... not your H.