relationship between father and son

Today was horrible. When I got home after the school, my father like always, was waiting for me with a angry face. He asked me why I was late and I told to him that I was with a girl and we were talking. He didn't believe and started to talk too loud and I was tired because everyday he do the same thing. After a long time, I asked my father why he was doing this every day with me... he really was getting me down.
He didn't say to me the reason and then I went to my room just to think about all my life with him. I started to think when i was young and i realized that he always did this to me. Always with a angry face asking me questions about everything, so i started to look in his past.
I went to my grandmother's house and i asked her why my father was so angry everyday and she explained to me that my father's childhood was difficult because he met some bad peoples and he tried to get away from those peoples. I guess that he has afraid to the same thing happening to you.