I may not be the person to offer you hope. However, there is advice I can offer.
Read about the 180 in the healing library (top left of your screen.)
Also - Please read, The Rules by Ellen Fein. There is another specifically for The Rules for Marriage as well. You can find used copies super cheap at abebooks.com and half.com
This book really explains a lot off what men find attractive - which includes their spouse, too. Even though I am married I found the book to be very insightful and helpful.
If you really want your marriage back I would suggest 1 - you pray for you, him and your marriage (The Power of a Praying Wife by Stormie O'Martian is a great book) 2 - wait until he really really wants you.
You don't want someone who doesn't really want you. If you are with a man who's level of interest in you is low then YOU will be doing all the work in the relationship. I think you have some experience with that all ready.
I can say that reading here helped me a lot. I know that one way or the other; I will end up being okay. It may not be today but it will happen.
So will you.
A gift is not given if it has been demanded.
Failure to attempt is failure.