I've been in situations where so much catastrophe had happened I finally couldn't feel anymore....at least I thought I couldn't feel anymore I was so numb to all emotions. But they were there, just under the surface.

Days later I just imploded. It was awful.

So no, I don't think it's possible to completely shut down emotions deliberately....they just wait and then emerge as they see fit, when they see fit, and in my case, how they see fit. My first suicide attempt.