Possible reality check here

It has occurred to me that the longer I am away from work, the less I want to go back. It's not because I don't love what I do, but I'm really wondering....when I am there, I feel like I am needed, and the need is strong. I feel like I am really helping kids who need extra support, but then, when I have days like today, where I ache, and I am teary because I feel like a failure with everything I try, I wonder if going back this spring is really what I should do....time will tell.