Gracey -
I'm sorry that you are feeling so bad. Something that helped me to make a decision about my marriage was to go back and read all of my posts. It helps to put things into perspective. Is this the way that you want to live? How is this affecting your children? The best interests of your kids should come first. You sound so unhappy. Is there realistically anything that you can do to make things better? If you tell him to leave you might find that instead of feeling alone that you will feel a sense of peace. You might even look forward to coming home at night! Only you can decide what is best for you and the kids but I would take peacefulness over being demoralized constantly any day.
Hugs, Jo