Trying to go back to school

My parents want me to withdraw from school for a couple of months, however, I do not want to. They are under the impression that I need a break for mental health reasons and they do not want me to go back in the school and party environment. I did have a little too much fun this summer, however, I was willing to work with them and seek treatment while at school. I am already signed up for fall classes, but they want me to take a leave of absence. They are paying for my tuition. Is there any way I can go back, even if they are not on board? I am a legal adult and I am registered at the school.
The school is all the way across the country so I would have to take a flight-- and I do not have the funds.
It’s a tough situation.

Can you name the school since some CC posters might have a better insight if the school is named?

Is it a California school?