Is it suitable time to say goodbye SIS?

I'm not sure about continue to study in SIS. My father thought that he would change school. I don't like his thought because I like this school. It's better than other schools I have been learnt before. All my friends in this school are quite different. They are generous, kind. They helped me whenever I'm in bad conditions. But sometimes, they make me crazy and then I shout at them. Just 4 more weeks, I have to go! I tried to entreat him but he did not change what he thought. I cried when he said that. I felt so confused. I don't know how to explain with my friends. I did not promise that I will stay here but they will think that I'm not a good friend. It's nearly to say goodbye with all guys in Y6 Int'l. I will remember all of you even I never communicate with you! i will remember SIS. I promise that when I'm gone, I will return.