If you have been ignoring your co-workers to that level, it just says that you only think about yourself. It also add to the fact that you are not a great team player.
Whenever you see a co-worker struggling with something, you must offer your help, even if it just something small. That little bit of help can turn into a strong bond between you and other co-workers. Nothing works better than a united group of workers in an organization.
So don't be afraid to get your hands dirty and assist others in need. Great things come to great people.