There are four kinds of love in Western tradition.
One is sex, or what we call lust, libido.
The second is eros, the drive of love to procreate or create—the urge, as the Greeks put it, toward higher forms of being and relationship.
A third is philia, or friendship, brotherly love.
The fourth is agape or caritas as the Latins called it, the love which is devoted to the welfare of the other, the prototype of which is the love of God for man.
Every human experience of authentic love is a blending, in varying proportions, of these four.
Know Thyself 