I need help. I dont know what to do?

I feel really left out in this family everyday. I have 3 blood brothers and 1 half brother. Im the only daughter in this family. After my parents got inbto a divorce, everybody splitted up. My brothers are living with my grandparents and im currently living with my dad and my stepmom and my stepsiblings. I have 2 stepsisters and 3 stepbrothers. One of my stepsister doesnt live with us but whenever she comes over, my 2 stepsisters never asked me to do anything with them. All they ever ask me to do was babysit her kid. I feel depress and kind of angry. My biological mother lives all the way in Georgia with her new husband and i really miss her. i wish she would be here for me when i need her sometimes but she chooses her husband over me and my brothers. I dont really get to see my brothers much either. I use to be so close to my cousin but ever since she got pregnant, everything changed. We kind of stopped talking and hanging out but we talk here and there sometimes. Its been 2 weeks since i havent talked to her and its been 1 month since i havent seen her. I feel like i dont have anybody to love me besides my boyfriend. His family really likes me and i really love his family. My boyfriend really cares about me and he's always there for me when i needed him the most. He do everything for me and i love him so much. We've been dating for 1 year and 3 months. Sometimes i dont wanna come home because no one cares about me. My own father never have the time to talk to me or even have a daughter and father dinner time.