Relieving Stress, how?

My name is Bob and this is my story. I am 15 years old and live in New York City. My father is from Colombia and my mother is Guatemala. I however, was born in NYC and lived here all my life. I have a brother named Mike who is 3 years and 8 months older than me. My other brother, who I called Stewart , is about 15 years older than me and was always distant from me. Today Stewart lives back in Guatemala and has a wife and son. I have Richard; another brother who is 17 years older than me and is the oldest out of all of us. Today, he has a wife, a daughter, and another baby girl on the way. He does not a good education and is living at a low budget. Stewart and Richard were both born in Guatemala and came to the United States as teenagers. My father moved out when I was about 4 years old. He moved to my grandma’s place, which was on the same block as my mothers home. Making the distance only a few minutes away. I lived with my father and grandmother for some time until I was 12, then he found his wife and moved out. Since then, I only see him once a week at most. I moved out of my grandmother’s place when I was 13 and soon after Mike moved in. Throughout my early childhood, I spent time with my grandma (fathers mom) who is now 68 years old. She continuously took me to New Jersey and we spent time with the family who loves me. My mother on the other hand is a strong woman. She has always worked ten through twelve hours a day for us. She bought us the freshest clothes and makes sure we live comfortably. My relationship with Mike was good until we both became teenagers. We became more aggressive and violent with each other. Today, we hate each other. He is now 18 and is making up high school credits because he failed Math cles. My mother miraculously convinced him to move back in with us, making my life hell. He has mental issues. He actually takes visits to a Psychologist. Him and me make my moms life hell when we fight. She has had heart problems and had a mini-stroke because of her stress. She cries at random times and I think suffers from nervous depression. However, she does not visit a therapist or medical help she needs. She is the main reason behind why my brother and me are very nervous people. She has four sons and no daughters. Stress drives her crazy. I am not a clean and neat person and that also bothers her. She does not physically abuse us, but mentally. ACS made a case for us, but it dropped. My family is ashamed of my brother. They love me. I love them. My mother threatens to leave here and go back to Guatemala. I get A’s and B’s in school, but my social skills are not as good as I want them. I need some opinions. What can I do to relieve my stress? If you have any questions for me, let me know.