It is emotionally draining. AND oh so lonely. I can relate. You see them at home, and wonder why doesn't he just throw his arms around you and tell you it's all gonna be OK. That he's finally realized what he has done, and he will do anything to make it up to you. I keep hoping one day I'll find him kneeling by my bed when I awake with tears in his eyes....
Don't forget where your focus needs to be! Your good... Your strong!