There are no limits on true self-giving. It is not just to those one likes that one makes the offering. This involves a love that issues from the very CENTER of the person's being, directed to the CENTER of the other person's being, a love that gives ALL that the person is in order to foster the other person's life, a love that is offered to EVERYONE, without exception and without condition. The love is not offered to people because they are one's friends; people become "friends" because one loves them.
To see every woman and every man as sister and brother is to participate in the faith vision of the mystic, whose central intuition is a graced effect of contemplation, which gradually transforms our way of seeing reality. This mystical vision is far from an esoteric or "misty" dream, for surely the survival of our planet depends on a universal realization of this unity and the interconnectedness of all peoples and of all the cosmos, in the one Love which is God.