Love can never exist when there is just one.

Even with Krsna the Supreme Personality of Godhead and cause of all causes, there must always be a two-way exchange for love to exist. This is why Krsna created Srimati Radharani just so He could experience loving exchanges with a women.

Krsna created Srimati Radharani just so He could experience the loving effection and association with a women, because real love can only be realized and exist when there are two in the relationship.

Krsna therefore created Srimati Radharani just so He could experience the loving effection and association with a women, because real love can only be realized and exist when there are two in the relationship.

Srimati Rādhārāṇī is the manifestation of the pleasure potency of the Supreme Personality of Godhead and is Krsna's direct expansion. 

Srila Prabhupada - "When Krsna wants to be attracted by a woman, He has to create such a woman from His own energy. That woman is Rādhārāṇī." (Srimad Bhagavatam Canto 3 Chapter 31 text 38, Purport)

Srila Prabhupada - "Love means two, there must be two, the lover and the beloved." (Lecture on BG Chapter 9 text 2-5, New York, Nov 23, 1966)

Srila Prabhupada - ''We have got the propensity to love. Love means somebody else. Love cannot be one or love cannot be executed by only one, there must be another one. I love somebody; somebody loves me, there must be lover, there must be beloved, and the transaction, then there is love." (Lecture on Srimad Bhagavatam Canto 1 Chapter 2 text 6, Delhi, November 12, 1973)

Srila Prabhupāda – ''Unless there are two persons, where is the question of love? Love means two persons, then there is exchange, then there is love. I must deal with you open-hearted, you must deal with me open-hearted, then there is love. So if you want to love Kṛṣṇa, God, then these things must be there." (August 9, 1976, Tehran)

Real love is voluntary based on a spirited exchange of ideas and personal contributions coming from each individual jiva-soul. 

Such loving exchanges can never exist in a one-way or one-sided domineering affair where personal contributions are denied, ignored and never appreciated as an expression of one's independence. 

That kind of impersonal association only extinguishes the jiva-soul's individuality, free-will, and their ability to contribute their own unique offerings.

Srila Prabhupada - "Love is reciprocal, voluntary, good exchange of feeling. Then there is love. Not by force, no, Krsna does not want to become a lover like that, ‘You love me, otherwise I shall kill you!" (Washington DC July 8, 1976)   

Srila Prabhupada - "In the spiritual world service is voluntary. Some devotees want to serve Krsna as flower; so they become flower there if they want to be a flower and lie down at the lotus feet of Krsna, then he becomes flower, voluntarily, and he can change from flower to human body also. That is spiritual life. There is no restriction. If some devotee wants to serve Krsna as cow, he serves Krsna as cow, as calf, as flower, as plant, as water, as ground, field, or as father, as mother, as friend, as beloved, anything. It is inconceivable, yet a fact." (Srimad Bhagavatam 6.1.1-4 - Melbourne, May 20, 1975)

Srila Prabhupada - ''Love means you take and you give also. Suppose if you love somebody and you simply take from him, but you don't give. Oh, do you think it is very good? No. It is not good. That is NOT love. That is exploitation. If I go on simply taking from you, and if I don't offer you anything, that is simply exploitation." (Lecture on Bhagavad Gita Chapter 9 text 2-5, New York, November 23, 1966)

Srila Prabhupada - "Rādhā and Kṛṣṇa are one and the same, but They have assumed two bodies. Thus They enjoy each other, tasting the mellows of love. The two transcendentalists Rādhā and Kṛṣṇa are a puzzle to materialists. The description of Rādhā and Kṛṣṇa from the diary of Śrīla Svarūpa Dāmodara Gosvāmī is a condensed explanation, but one needs great spiritual insight to understand the mystery of these two personalities. One is enjoying in two." (Caitanya Caritamrita Adi 4.56, Translation and Purport)

Srila Prabhupada - "Śrī Kṛṣṇa is the potent factor, and Śrīmatī Rādhārāṇī is the internal potency. According to Vedānta philosophy, there is no difference between the potent and the potency; they are identical. We cannot differentiate between one and the other, any more than we can separate fire from heat." (Caitanya Caritamrita Adi 4.56, Translation and Purport)

Srila Prabhupada - "Everything in the Absolute is inconceivable in relative existence. Therefore in relative cognizance it is very difficult to assimilate this truth of the oneness between the potent and the potency. The philosophy of inconceivable oneness and difference propounded by Lord Caitanya is the only source of understanding for such intricacies of transcendence. In fact, Rādhārāṇī is the internal potency of Śrī Kṛṣṇa, and She eternally intensifies the pleasure of Śrī Kṛṣṇa." (Caitanya Caritamrita Adi 4.56, Translation and Purport) 

Srila Prabhupada - "The Impersonalists cannot understand this without the help of a mahā-bhāgavata devotee. The very name “Rādhā” suggests that Śrīmatī Rādhārāṇī is eternally the topmost mistress of the comforts of Śrī Kṛṣṇa. As such, She is the medium transmitting the living entities service to Śrī Kṛṣṇa. Devotees in Vṛndāvana therefore seek the mercy of Śrīmatī Rādhārāṇī in order to be recognized as loving servitors of Śrī Kṛṣṇa." (Caitanya Caritamrita Adi 4.56, Translation and Purport)

Srila Prabhupada - "As Kṛṣṇa is the highest emblem of spiritual perfection, so Rādhārāṇī is the highest emblem of that spiritual pleasure potency by which Kṛṣṇa is satisfied. Since Kṛṣṇa is unlimited, in order to satisfy Him Rādhārāṇī is also unlimited. Kṛṣṇa is satisfied just by seeing Rādhārāṇī, but Rādhārāṇī expands Herself in such a way that Kṛṣṇa desires to enjoy Her more. Because Kṛṣṇa was unable to estimate the pleasure potency of Rādhārāṇī, He decided to accept the role of Rādhārāṇī, and that combination is Śrī Caitanya Mahāprabhu." (Teachings of Lord Caitanya, Chapter 31)

Srila Prabhupada - "When Kṛṣṇa left Vṛndāvana for Mathurā, the gopīs became most dejected and spent the rest of their lives simply crying in separation from Kṛṣṇa. This means that in one sense they were never actually separated from Kṛṣṇa. There is no difference between thinking of Kṛṣṇa and associating with Him. Rather, vipralambha-sevā, thinking of Kṛṣṇa in separation, as Śrī Caitanya Mahāprabhu did, is far better than serving Kṛṣṇa directly." (Nectar of Instruction 10, Purport)

Srila Prabhupada - "Of all the devotees who have developed unalloyed devotional love for Kṛṣṇa, the gopīs are most exalted, and out of all these exalted gopīs, Śrīmatī Rādhārāṇī is the highest. No one can excel the devotional service of Śrīmatī Rādhārāṇī. Indeed, even Kṛṣṇa cannot understand the attitude of Śrīmatī Rādhārāṇī; therefore He took Her position and appeared as Śrī Caitanya Mahāprabhu, just to understand Her transcendental feelings. In this way Śrīla Rūpa Gosvāmī gradually concludes that Śrīmatī Rādhārāṇī is the most exalted devotee of Kṛṣṇa and that Her kuṇḍa (lake), Śrī Rādhā-kuṇḍa, is the most exalted place." (Nectar of Instruction 10, Purport)

Srila Prabhupada - "So our business is that we have to take shelter. Instead of taking shelter of the external energy. That is also Kṛṣṇa." (Lecture on BG 4.11 -- Vrndavana, August 3, 1974)

Srila Prabhupada - "There is no doubt. Kṛṣṇa, Kṛṣṇa's energy: nondifferent. But that is not very beneficial to us, we have to take shelter of the internal energy and Śrīmatī Rādhārāṇī is the symbol of internal energy. Therefore we take shelter of Śrīmatī Rādhārāṇī in Vṛndāvana, and that is our perfection of life. Then it will be easier to associate with Kṛṣṇa very easily. That should be our motto." (Lecture on BG 4.11, Vrndavana, August 3, 1974)

Conclusion-

Srila Prabhupada – "Love is reciprocal, voluntary, good exchange of feeling. Then there is love. Not by force, no, Krsna does not want to become a lover like that." (July 8, 1976).**..