I'm so sorry Molly. Right now, you need the support of your husband more than ever and he has abandoned you. Please focus your attention on yourself and your needs right now. Eject him from your life. You need to detach now more than ever. Reach out to your friends and family. Get support from wherever you can. This will be painful on a level you can't imagine but you WILL get through it. And you will come out the other side a stronger person. Perhaps then, your H will see what he has given up. But right now, he can't be your concern. I'm praying for you.
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