Yeah. We can of course live our life in solitude. We have that choice. But the truth is that we are made so that we find someone, our SO, our life partner, so that we can grow together, love one another, help one another with the path of life, create a life together. It's not merely social conventions, it's deeply engrained in ourselves. Some will disagree of course, but to live alone is to miss on life imo.
