If your H is in MLC get used to it. It's all about them.
That's why we tell you to take care of yourself and put your focus on where it will do the most good and that's you.
It sounds like you've identified some areas that you could work on in yourself. These things that may need changing are for you. Do not do them to try and save the M but because it's something you want for yourself. That way the changes stick.
It will be beneficial to be the best you whether your marriage is saved or not.
