Zoning Out

This morning I was so zoned out whilst driving that I almost hit the back of another car.  I started doing this in the end stages of my failing marriage.  I couldn't deal with the fact that I had failed again and I was doing everything I could to cope with it.  I read that children learn this coping method growing up in stressful environements.  I did as I was back and forth between parents and grandparents on a daily basis.  

This morning my boyfriend told me he felt insecure in his job.  He never talks this way although I have wandered if he's more insecure than he lets on.  If he felt this way all along, why would he commit to this new house and responsibiltes?  I find myself zoning out alot at work.  Everyone here has been great to me but when I feel I've made a mistake or messed up, I find myself just numbing out to deal.  It makes me extremly tired.