Can't stay angry!!!!

Why in the world is it that one day I can't stay angry with my boyfriend whenever he does something to piss me off??? Like this is not the first no matter how mad I am at him it only lasts a day and some... I feel lonely aggravated and everything above promising me to call me back and then not doing it makes me upset... REALLY UPSET ..... I am really tired of saying sorry to him... I am tired of trying to understand... I am gonna Clear this misunderstanding up maybe tonight so nighty night everyone time to go talk to my boyfriend how I fell about this.