With the practice of meditation we can develop this ability to more fully love ourselves and to more consistently love others.
Christians are to love their neighbors as we love ourselves.
To grow in our ability to love ourselves we need to receive love as well.
To love our neighbor as ourselves is such a truth for regulating human society, that by that alone one might determine all the cases in social morality.
The more we learn to love and respect ourselves, the more we will become attracted to people who will love and respect us and who we can safely love and respect.
To not love ourselves can keep what we want from us.
We really don't know how to love each other because we haven't really learned to love ourselves. In many instances, not all, it's not malicious. We've just been conditioned to such bad behavior.