The people who want to keep you alive are usually the people who care about you the most. Friends, family and somtimes the doctors. Deep down they can never understand how bad we feel in these situations; all they can do is make an evaluated guess and help us all they can.
It is impossible to decide why we want to stay alive. Death seems like a truer paradise to troubled souls. The longer we stay alive the harder it becomes to live.. but people will always try to support people like us. Support seems to be all we can cling onto.