Everyone wants to be known as a nice, sweet person - but no one wants to be a doormat. It’s obvious that there is such a thing as too nice, but the problem that many of us face is when our good nature tends to be taken advantage of. Are you sick of being the “nice” one in the group? It’s about time you learn to make your heart grow cold, fast. Here are some tips from psychologists on how to be a bit more cold hearted and a bit more assertive.