The same as a lot of 'can't take no more people'. I mean some people arn't happy with aspects of their life, some even say they are depressed with work and stuff, but I think you only know true depression and unhappiness when you live it 24/7 for years, I think that maybe Robin was one of them, impulsive yes, addictive personality I'm certain, impulsiveness often goes hand in hand with addiction, shove underlying depression and a messed up life on to that and it's not a nice future. It's horrible I know, Robin's happy now but left others devastated without probably realising it at the time.