You are not a robot, right? It is very normal to feel pangs of grief and sadness. I don't think anybody can really turn out okay if they don't spend *any* time feeling the loss.
Do what is best for you (going dark to get yourself in a better place). I haven't lived with my H for almost two years and we hardly have any contact. When I do have to deal with him I get so annoyed. But I am way past the loss part. It took me a loooooooooooooooooooooong time to get there though. It's not a race and while it stinks out loud you do have to allow yourself to feel what you feel. The real trick is feeling what you need to feel but not getting stuck.
The legal side of divorce is very stressful so take things one step at a time.
