It would help if you provided more details. Some obvious questions to get you started:
What exactly is your job role?
What sort of work do you have to do?
In what industry? What geographic area?
Are you given a small amount of easy work and get it done quickly?
Are you co-workers doing the same sort of work, or more interesting ones?
Can you ask your boss/manager for additional responsibility, work, etc?
You are not wrong. Working on projects that are not your own can easily become boring and repetitive. Going to school is a good advice, as it opens your mind to more opportunities. You mentioned side projects. Why not invest your free time in a cool, potentially profitable, side project. Who knows? maybe you'll be able to quit your job and work on it full time eventually.