should I just quit?

Miranda
I have two jobs. I'm a CNA and a waitress. My waitress job I've had since I was 16. I make 2.13 an hour and average $20 in tips a night unless we're busy. As a CNA I make 8.50 an hour and only work every other weekend doing two 8 hour shifts. I like being a waitress better. I'm so exhausted after working so much and doing teenage things since I'm 18. Example: it was not my intention to end up on a mountain at midnight last night but it happened. I'm also in college and have no idea what I want to major in. I'm just so tired I want to cry and I feel like if i quit my CNA job I'll be letting my teacher who has been my teacher for 3 years in highschool down but I like being a waitress better. ADVICE????