Moved to the US many years ago after living in Asia and in Europe and I've struggled the most here in making friends and meeting new people. I thought it was me and even moved to a bigger city in the US and still find it hard to make meaningful connection with anyone. Like others mentioned maybe it's the American capitalism, or internet. I think also maybe cars (greater distance, individual travel, road rage, etc.) influence in how we feel lonely but still surrounded by people.