I think you know this, Sara... people w/ issues don't change until they hit rock bottom. Your H isn't going to hit rock bottom w/ you during an in-house-separation.
But you're right. Life is making you choose between two big piles of poop.
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final