I can't imagine the fact of living with my parents for almost 3 more years
What is wrong with living with your parents for 3 more years?
They treat me as if I am a child.
Even though you are living in their house, they should still treat you as an adult. Maybe you can bring it up to them that you feel this way.
I don't know if that will change anything.
You have to at least try to explain to them how you feel. Your parents should listen to what you have to say, and maybe they will stop treating you as a child.