Why? Why not. You have a choice. Why be miserable. Why not try to bring a little bit of love and joy into the world instead of adding to the general misery. Enough bad things happen on their own. We don't need to be adding to the world's problems.
As much as you may feel alone, you aren't. You are interconnected to all life on earth and to the universe. That's reality. So stop your existential angst and get on making the most of it.