Don't beat yourself up too bad, Spartan. I did the same thing last September and had the same feelings that you do know. I felt like we were doing better and I ruined everything. I also feel like you do about being in a business partnership and not having your needs met, and feeling good about a fresh start.
So 4 months after I did what I thought was a deal killer, we are still having ups and downs. Everytime we start to do better together and I feel better about where we are, something happens. More times that not it is my H who starts to feel too good about us getting closer and has to justify his behavior.
You didn't screw up. You did a little backslide.
I, too, am afraid of being hurt again and my walls keep going up and I know that is not helping anything.
Focus on trying to do things for you and your kids over the next few days and give your W some space. It is hard not to think you ruined everything, but you didn't.
Keep your chin up!
M44 H57 D17 (special needs) M 18 yrs Bomb 7/2/12 Still living together