Distinguishing between a democracy and a republic

Whilst researching different forms of government, I found it hard to distinguish between a democracy and a republic. There were a trillion different opinions floating around the web, few of which stated their source. In this writing, I record my own findings (without compounding the problem, hopefully).
Mental Health Philosophy

Life is meaningless

Your motivation is gone. What’s the point in doing anything? Nothing has any intrinsic meaning, which saps the little life energy out of you that remained to guide you to your goals. Welcome, my friend, to the world of nihilism.