arebelspy is spot on, but I'll give you my own perspective.
I've been working since 16 basically (not full time until 18-19) and just recently graduated with a BS in MIS this year. I'm 24 now.
For the past 4 years, I went to school full time online, had a full time retail job, installed satellites on the side, and also fixed computers on the side. That's in addition to maintaining a decent social life and a girlfriend. If you want to talk stress and burn out, then look no further than my situation. Four years later in my job, I'm still only making ~$14.5/hr. Granted, I'm in a very rural area and live at home currently, so my options are limited here. I'll be moving to take advantage of my education soon. I'm not necessarily saying your situation is less stressful than mine, just that it could always be worse. And retail is notoriously bad because its so demanding for little pay. Everything has a price, and if you're getting compensated for that stress, then it can be worth it to stick in it. I should have quit forever ago, but I'm glad I didn't.
The point I'm making is, you're in a great situation. Only 2 years of work and you're making incredible money while maintaining super low expenses. I'm not saying these things won't happen for you in the future, but you're too young to give it up in my opinion. So really, don't quit unless you have a grand plan on how to circle back around. Every time I take a few weeks off or ask for part time, I seem to always end up getting restless and want to get back on the train to FI as quickly as I got off. Again, if you have specific plans, this won't happen to you, I'm just saying to make sure you do indeed have the specifics of the why, how, when, where, etc, worked out.