I could use some advice. Sorry if it's a little long.
I'm a full time student doing online college courses for Human Resources Management. Prior to this I have a graduate certificate in Event Management. I also work 2 "part time" jobs. One is mainly janitorial but pays 2x minimum wage, gives me 40 hours per week, provides opportunities to move up or laterally and I have 9 years of seniority there. The other is a banquet server position at a hotel at minimum wage + gratuities, less than a year, anywhere from 0-30 hours a week. I originally applied to the hotel for an event manager position but was deferred to banquet server due to lack of experience. I took the job hoping to get my foot in the door and move up the ladder.
Here's where it gets complicated.
When I signed my contract for the hotel they had me sign a paper saying I'm volunteering to work longer than 8 hour shifts. At the time I wasn't a student so I didn't see any problem with it. The shifts I ended up with are often 10-15 hours and its not uncommon to work 4pm-5am. I went back to school in September and thought I could balance everything. Sooo wrong. I failed a class and lost my marbles frequently. So when I renewed my contract at the end of January I changed that piece of paper to "I can only work 8 hour shifts". They really didn't like that and pulled me into a meeting with my dept head and head of HR to give me shit for it. I refused to change my mind, calmly laid out my logical reasoning (school is my priority, there have been issues with getting time off for exams, etc etc). I'm now persona non grata with my dept head/ the woman who makes my schedule.
I was hanging on to the job in the hopes that I'd be able to move up the ladder, either in events or in human resources when I'm finished school (1.5 years from now) but I'm now wondering if that would even be an option considering how antagonistic they're being towards me right now, and whether I want to put up with the place for that long to get there. My other job definitely has HR areas to advance into but I liked having multiple options.
I'm completely overwhelmed trying to balance both jobs and school, let alone do any wedding planning. I'm stressed. My work is failing, my schoolwork is failing, I'm eating poorly, I don't sleep well, I get zero exercise, I'm getting stress heartburn every day, my relationship isn't deteriorating but I'm certainly not making enough time for my FI...something has got to give.
I think its time to quit the hotel job but I juuust renewed my contract and I have industry contacts there so I'd really like to do so gracefully and not burn any bridges. I've never been in this situation before so I could use some advice. I know I need to talk to my department head directly because she threw a fit when I changed my hours availability without telling her (nevermind the fact that I had a death in the family that weekend and was otherwise preoccupied) I have a review meeting with her on Thursday but I don't want to "blindside" her again so I feel like I should give her a heads up before that.
How do I resign tactfully without making management hate me?
So sorry it's so long, I feel like I'm going crazy and I need outside opinions. Thanks so much in advance.