I was relocated to the US for business a few weeks ago, we live in an apartment building with my fiancee. Both in our countries we say hello to each other with the neighbours when we run into each other in the building even if we don't know each other.
Noone says hello back to us here, we introduced ourselves to lots of residents but they still don't greet us back, they just ignore us when we say hello.
Is it not a thing here to say hello to neighbours? I am not asking to be judgmental but it is a very weird situation and we are not sure how to interact. Is this not the proper way? Should we just not say anything to them?