Consider this. If you quit school and get a job (assuming you CAN get a job) it will probably be a menial, low-paying job. It you stay in school, you won't be earning money but you will be increasing your knowledge and ability to get better-paying jobs. So in say, 5 years time, you will either still be at the menial, low paying job and probably stuck there for good, or you will be starting a better paying, more interesting job with the hopes of improving your life in the future. Which way sounds better. The rest of your life is a long time to be stuck in a nothing job because you couldn't be bothered to finish your education.
In my opinion, there may be some factors that are forcing you to feel to work instead of going to school. You need to settle down and examine those factors that are driving you to work instead of going to school. This will give you a good moment to value what is good for you.