My parents would never allow me to get a snake. Now at 25 I look after my dad from a distance and got my own snake. I always knew I would get one when I was ready and setup in my own place. I didn't even bother asking them 2x because the answer would have been the same. I'm not sure if you work or not but having a reptile is expensive and an ongoing expense. One day you will get one, try to make it apart of your lifetime goals. Do good in school and strive towards a future that will allow you to afford snakes.

Life is cruel and unfortunately it sounds like you are learning that at a young age. Trust me though family is all you have in this world, try to put yourself in your moms shoes at times too. Even though we're not all dealt the best cards life is what you make it. Stay positive !