I empathize so much with Mere. I also was working in a job where I felt needed and useful and (most of the time) enjoyed myself. I was trying so hard to hold on - I had my hours cut to 4 per day in hopes I could continue. Unfortunately, I couldn't cut it.

What I also suggest is that you get psychological help if you can. I needed a lot of counseling to deal with the grief and loss. Even hospitalization at one point. There's a lot of anger and frustration which needs to come out in order to reach the acceptance stage, sometimes.