I'm in the same shoes as you. I know your fear. I've been clinging to my wife, thinking that as long as she's staying in the house, seeing my changes, and my love for her, that it'll break through to her. And I've lost 47 days of my life. Nothing is better than on Bomb Day. Nothing. All I've done is waste 47 days of my life.
I know you want to hold on to her as much as you can. You want her to know how you feel, how you care. But it's not working. She's moved out. Talking about the relationship is backfiring.
You need to set goals for yourself based on your values. You need to detach your emotions and actions from her so that you don't bounce around so much. You need a real break from each other so that you can find the real Lee, and she can figure out what she really needs. Children make this tough, but that's why the LRT is probably the best for your sitch and mine.
Be strong, be confident, be the man you dreamt of being when you were a kid.