Unfortunately no. You are still a minor and so must be under the guardianship of your parents/mother.
It may seem like life would be better with your Auntie, especially at your age when most teenagers think their mother is the worst in the world but you may not really understand why she fell out with your aunt.It must have been something very serious and she feels she needs to keep you away.
You are your mother's child, part of her and so she wants to protect you, keep you safe and love you until you are mature enough to cope with all the dangers and heartbreaks of life.
Don't fight her. Be her best friend. Help her and try to understand all she has done and is doing for you. How lonely she would be without you! That is why she is fighting to keep you and your love and she is probably heartbroken that someone else has stolen your affection and loyalty. No-one should try to break the bond between a mother and child.
Be patient. Be positive and be loving.
With time your Mum might let you stay in contact with your Aunt but if not you only have to wait a few years and then you can make up your own mind..