I can relate. My mother wanted daughters. Instead, she had 4 sons. She was miserable. Though, I have to say that when her granddaughters were born, she was not much better than she was to her sons. As the oldest son, I took the biggest brunt of her abuse / saddness.

So, how to get along with her? Try saying thank you for the things she does do. It will build communication and a relationship. Other than that, start making plans now to move out when you are old enough, e.g., plan to go away to college. Try to find maternal substitutes, e.g., a godmother, grandmother, aunt, cousin, neighbor, girlfriend. Build healthy family relationships with other female members. If possible, find someone who you can confide in about your relationship with your mother so the disappointment is not bottled up inside you. Professional help with a T will also be of benefit.