It comes from selfishness.
We want so much to understood, to be appreciated, to be loved. Not just one of those, but all those things together. Love should be enough, but it’s often not–that’s because we’re selfish beings.
So we wander around by ourselves, solitary, lonely, unsure of what’s next. It’s human frailty at its finest: one person, lost in a sea of people.
It’s also self-centeredness at its height. The real question we should be asking ourselves, instead of “why am I alone?” or “who understands me?” is “who can I be for _?” or “who can I love?” An even better question than that is how. Everything else, all those excuses are just self-preservation. Self-protection. Not. Not love.