Although people think they perform better on caffeine, the truth is, they really don't. Actually, we've become so dependent on caffeine that we use it simply to get back to our status quo. When we're off it, we underperform and become incapable.
Isn't that absurd?
In his book The Untethered Soul, Michael Singer argues that your energy should come from within—from your why—not from external stimulants. The scientific backing is substantial yet unsurprising: Intrinsic motivation destroys extrinsic motivation every day of the week.
Motivation aside, healthy eating, sleeping, and intensive exercise produce higher quantities and quality of energy than caffeine ever could. A holistic approach to life is essential. Garbage in, garbage out.
Give up the caffeine and see what happens. To avoid withdrawal headaches, replace your caffeine with something else. After a few days without caffeine, you'll develop confidence in your ability to function without it.