When i angery my friend, it wrong? Why i do like this to my friend?

I and my friend very frinend. I love her like my relative and she love me too. When i go to school we alway waiting me me and me so like this. In september 2009, I have to leaft my home to find work amd continune university. I want she come with me buta she want to wark. I and her live a way , we promist ,when i go to home or her have to tell each befor go. Futhermore in june i want go to home , i tell her and ask you can to meet me? she said , she just return her home the nex month she can. I continune if next mont befor you go , you tell me beause me waiting nex moth.What i angerythat she go home not tell me, When she back she just tell me. in september i go to home and tell her you can to meet me? she can't to meet me .This is my why. What you tell me a bout my angery wrong?