Why am I alive? Some may say it is because a sperm met an egg inside of my mother's womb, but there is much more to it than that, and that "much more" is part of the very reason I enjoy being here so much. I suppose I should elaborate.
I exist because some 4 billion years ago in the primordial soup that was Terra's early oceans, a single cell was created, this cell was the beginning of the human species. 600 million years before Terra came into existence a star we now call the Sun came into existence in a wondrous way, forming our solar system, a small speck in a vast sea of trillions mores. 9.71 billion years prior to the forming of the Sun our universe was in a static state, a ball of matter so tiny and compressed one would hardly believe it could create what we know today, but at that point something miraculous happened, in an instant it began to expand and chemicals began reacting with each-other. They created large balls of energy, reaching temperatures so high that they then began to form all of the chemicals that now make up my very being and everything on our planet.
It is because all of that happened that I am able to exist. And, the fact that in order for me to exist, there must be an unbroken string of history, 13.77 billion years long, that connects me, to the first human cell, to the creation of our planet Terra, our Sun, the Milky Way and eventually all the way back to the beginning of the universe, is why I continue to exist. It amazes me, bewilders me and excites me all at the same time every time I think about it and it gives me such an appreciation for everything around me, because I know that that same string connects everything around us to that same point in time 13.77 billion years ago.
There is much more to why I enjoy living so much, the universe is so complex and the more I understand it the easier it becomes to simply be happy with what is rather than what I want everything to be. But foremost, it is that appreciation that gives me the will and the joy to continue on living, for me to end it all here, to say goodbye and say the world is worthless, dull or sad, is like taking the most magnificent gift that could ever be imagined and tossing it in the trash. It is the ultimate fuck you to everything that was, is and ever will be.