And then, he found one. She was the most amazing friend that any pony could have asked for.
He loved her, and she loved him. But he didn't love himself. He was worried he was a monster. And how could anyone ever care about a monster?
That's the thing about friendship, though. Your friends are friends because they can see the great things you have inside. They can see past looks and family and even your own worries.
And they can see the goodness inside of you, even if you don't see it yourself.