Did I mean nothing at all to him?

Everyone deals with pain differently. He may not be able to express how he feels for whatever reason. It doesn't mean that he never cared about you, just that he may not know how to deal with it. My bf is the same way. He feels like he has to try and cut me deep every time we get into an argument. I've broken up with him a few times and his response is always something like "well, good finally" even though we have been together for about 3 years now. So don't take it so personally if he doesn't contact you.