According to Osho, wanting, desiring, and longing differ existentially: wanting is a clear, attainable need for concrete objects (house, partner), mundane and simple; desire is vague, head-driven craving for ideals like power or honor, inherently competitive, jealous, and violent; longing arises from the heart: a pure, beautiful thirst for love and ultimately for God, the subtlest love.
Wanting is knowing a specific thing you want, desire is a fuzzy push to be important, and longing is your heart’s gentle ache for love or God.