I can drink a pot or more every day for two weeks then stop completely for the next two. I'm so glad I don't suffer from caffeine withdrawal... That said, if I did, I wouldn't quit cold turkey, I'd gradually bring the amount down to a manageable amount first.
As for the health benefits, caffeine (in moderate amounts) helps the brain, not the heart. In larger amounts it doesn't help anything! (Quite the opposite.)
If you think you need it for the pick-me-up effects, then try taking more B vitamins (especially B-12). They can make a huge difference and are water-soluable so you don't have to worry about overdoing it.