What other behaviours are addictive?

People can develop addictive behaviours unrelated to substances. Interpersonal relationships can be addictive, as can work, over-eating, gambling and computer use.
Everyone experiences conditions of dependence during their early years, when this dependence serves their needs. However, it is important that people are given the opportunity as they grow older to cultivate and develop characteristics that allow them to live independently through functional relationships that feature mutual—though not complete--dependence.