Should I quit my job?

OK so I am a 15 year old student about to enter grade 11. I have been working at Quiznos recently. My boss wants me to work throughout the school year but I have a feeling it will affect my school since im taking both grade eleven and twelve courses. Excluding school its a 2 and a half hour commute there and back and I normally only work for three hours. So do you think I should quit till schools out? Relocate to a closer job? Orr what.