Kahlil Gibran said this quote

If you love somebody, let them go, for if they return, they were always yours. If they don't, they never were.

~ Kahlil Gibran

Let there be spaces in your togetherness, And let the winds of the heavens dance between you. Love one another but make not a bond of love: Let it rather be a moving sea between the shores of your souls. Fill each other's cup but drink not from one cup. Give one another of your bread but eat not from the same loaf. Sing and dance together and be joyous, but let each one of you be alone, Even as the strings of a lute are alone though they quiver with the same music. Give your hearts, but not into each other's keeping. For only the hand of Life can contain your hearts. And stand together, yet not too near together: For the pillars of the temple stand apart, And the oak tree and the cypress grow not in each other's shadow.

~ Kahlil Gibran

Ever has it been that love knows not its own depth until the hour of separation.

~ Kahlil Gibran

When love beckons to you follow him, Though his ways are hard and steep. And when his wings enfold you yield to him, Though the sword hidden among his pinions may wound you. And when he speaks to you believe in him, Though his voice may shatter your dreams as the north wind lays waste the garden. For even as love crowns you so shall he crucify you. Even as he is for your growth so is he for your pruning. Even as he ascends to your height and caresses your tenderest branches that quiver in the sun, So shall he descend to your roots and shake them in their clinging to the earth......But if in your fear you would seek only love's peace and love's pleasure, Then it is better for you that you cover your nakedness and pass out of love's threshing-floor, Into the seasonless world where you shall laugh, but not all of your laughter, and weep, but not all of your tears. Love gives naught but itself and takes naught but from itself.Love possesses not nor would it be possessed; For love is sufficient unto love. And think not you can direct the course of love, if it finds you worthy, directs your course. Love has no other desire but to fulfil itself.But if you love and must needs have desires, let these be your desires: To melt and be like a running brook that sings its melody to the night. To know the pain of too much tenderness. To be wounded by your own understanding of love; And to bleed willingly and joyfully.

~ Kahlil Gibran