I want to go to boarding school?

Ive had trouble with a few boys at school. Also with my friends. I want to be a doctor when i grow up so i thought of boarding school. I havent slept round my nans house in like 4 years as i dont like leaving my mum but i feel it could be a good choice. I can get my education in front of me, i also am around people witht he same intelligence and get to leave all the people behind. Problems being i dont know how to me my mum as she wont understand and were not in a financial place to send me to boarding school. What should i do. Im 15 by the way and have finished my first year of GCSE. thanks :D