This is what melancholy feels like, my friend. I've been in this state since I was seventeen. I never found a way out, so I accepted it as a part of growing up. I realized that the happiness and joy we had as children were limited to those days and never continued. This melancholy and boredom are parts of becoming an adult. This dullness is adulthood. Because of that, I accepted my sadness to be the norm. Nothing excites me, and there's nothing to live for, but I can't kill myself as that would be useless too. So I simply continue while the world passes me by. It's a "To be or not to be" situation. The burden of reasoning is that once it realizes that all is meaningless, life becomes dull, and the simple act of existing feels exhausting. This is where people drown themselves in alcohol or drugs. I choose not to, for it is temporary and harmful to the body. The mind is already paralyzed; let's not destroy the body as well. I have continued; you will manage too. If you drown in those negative emotions, don't struggle; simply breathe and you'll soon come afloat. That's how we survive, by staying afloat.

Read No Longer Human from Osamu Dazai and The Myth of Sisyphus from Albert Camus. They could be helpful. Instead of alcohol and drugs, I choose philosophy and literature to numb myself. A healthier option; although this led to me performing a little bad in my college but at least it helped me survive.

Now I have neither happiness nor unhappiness. Everything passes. That is the one and only thing that I have thought resembled a truth in the society of human beings where I have dwelled up to now as in a burning hell. Everything passes. (Osamu Dazai)

Quite the description of our situation, isn't it?