Osho - If Love has attachment in it, it is Lust
Osho - When lust is transformed and you enter into the city of love, you enter unattached. Remember, that is their definition of love. If love has attachment in it, it is lust, If love has no attachment in it, only then is it not lust. When you are in lust you are not really thinking of the other, thinking of your beloved or lover. You are simply using the other for your own ends. And of course, attachment is bound to be there, because you would like to possess him, and you would like to possess him or her forever. Because tomorrow also you may need, the day after tomorrow also you may need. You need a lover and you want to possess him.
LOVE is a gift. You give; you need not be worried about whether tomorrow he will be there to receive or not. Because a lover can give to the trees, to the rocks. A lover can give to the emptiness of the sky. A lover can simply flower and send his fragrance to the winds, even if nobody is there. Just think: Buddha sitting under his Bodhi tree, alone, full of love, overflowing.... Not that somebody is there to receive, but God is always there to receive, in so many forms, in so many ways.
Lust is greed, lust is attachment, lust is possessiveness. Love needs no possession, love knows no attachment, because love is not greed. Love is a gift. It is a sharing. You have found something; your heart is full, your fruits are ripe. You hanker that somebody should come and share. It is unconditional; who shares does not matter. But you are so full of it that you would like to be unburdened -- as when clouds are full of rainwater, they rain. Sometimes they rain in a forest, sometimes they rain on a hill, sometimes they rain in a desert, but they rain. The fact of where they rain is irrelevant. They are so full they have to rain. A lover is so full he becomes a cloud, full of lovewater; he has to rain. That raining is spontaneous.
Source - Osho Book "The Beloved, Volume2"