I think this is where a lot of people go a bit off course in life, relying on external factors for things that have to come from within. Particularly in relationships it can be a lot of pressure. I'm not sayin that others can't bring you happiness in life, of course they can but I don't believe that anything or anyone should or could be the sole source of it. Your happiness is ultimately your own responsibility and I feel it is very much linked to ones own self fulfilment in life.