You can only depend on yourself no matter other people give your what kind of promise. Because  as a humanbeing one people is already very difficult to deal with all the things in his own life. A person would never have the power to bear all the problem that happen in other person’s life. Because one person must be love himself or herself first then can he or she have the power and ability to love others which is determined by the nature of the humanbeings.  And the nature of the human is changeble it will change when time go throng and things change so there is no a certain things in the world of humanbeings what we can do is to accept the uncertainty and try hard to live the fullest of the life.