I've been working for a relative's company since I graduated from high school in June '03 (the company specializes in IT and medical equipment),

First of all, your question is not just about opening your mouth to talk about leaving your job, but it's a matter of interpersonal relationship management and future risk prevention.

From your description, your relative is still good, you want her to understand that you want to do something new to try to hope that he understands and supports. Let her support you to try it out or have some fun and hopefully give a chance to stay without pay for a while. Instead of leaving the job completely.

Secondly, if you do a good job of making interest in the barbecue stall, you then communicate with her to leave the matter

Thirdly, if the barbecue stall is not doing well, you can go back to the name

The key is the first step, how do you convince her that you want to rest for a period of time to have fun, and I estimate that you are currently thinking about this is also because of the current stage of the benefit is not too ideal, you can stand on their own! The first step is to convince her that she wants to take a break from her job, and that she wants to experience a different kind of life.