"If you do not like art enough to do it every day whether you have a class or not, you need to find a new career"
Something my intermediate drawing professor reiterated on an almost daily basis.
If you feel that you cannot devote any time to drawing on a given day, because you don’t “feel like it” (as opposed to simply not having time, which is another matter altogether) then you are looking into the wrong career, and you should probably acknowledge this sooner rather than later.
Art is an act of passion. If you cannot bring passion and dedication to your creation, you are not suited for it. No matter how wonderful your technical skills are, your artwork will lack the living quality of a less skilled but more dedicated individual.
I am not saying that if you are not dedicated to art, you aren’t allowed to draw anymore. Far from it. I am saying you should rethink being an artist as a career, and investigate another line of employment.