Unfortunately I agree that not every marriage can be saved. Although I do think you did the right thing by asking him to leave if his presence was making you uncomfortable. I ask the same of my H, and I now believe that he hadn't moved out, I would be where I am now.
Look after yourself and your child. YOU ARE THE MOST IMPORTANT human being at the moment. I know easier said than done.
Keep faith that something better will come your way :-)
