Among Srimati Radharani's innumerable transcendental attributes, She has twenty-five principal qualities.

1) Radharani is very sweet and most charming to look at;

2) Radha is adolescent and always freshly youthful;

3) Radhika’s eyes are doe-like and restless;

4) Sri Radha’s face is smiling and every blissful’

5) Auspicious, beautiful lines adorn Sri Radha’s lotus hands and feet;

6) Radharani maddens Krishna with Her fragrant bodily aroma;

7) Srimati Radharani is the most exceptional singer and vina player;

8) Radha’s words are charming and pleasing;

9) Radha is expert at telling jokes that delight Krsna;

10) Srimati Radhika is exceptionally humble;

11) Radha is the embodiment of mercy and compassion;

12) Sri Radha’s intelligence and wit surpasses all;

13) Radharani is expert at performing all activities of love:

14) Shyness is the shining gem in Radha’s character’

15) Srimati Radharani isn't the vthe beacon light of modesty and never swerves from the path of honesty;

16) radha is never perturbed by worldly sorrow or misery;

17) Sri radha has unbounded gravity and sublimity;

18) Radhika is ever fascinated to unite Herself with Krsna;

19) Radha possesses Mahabhava, the highest sentiments of love;

20) Radharani is the reservoir of loving affairs in Gokula;

21) Radha’s transcendental glories are shining in all the worlds;

22) Sri Radha is most affectionate to her superiors;

23) Radhika is submissive to the love of Her senior girlfriends;

24) Radharani is the chief among Krsna's gopi lovers;

25) Radha always keeps Sri Krsna under Her control. Krsna submissively obeys Radha’s command.

Srimati Radharani always keeps Her hand on the shoulders of Her friends and always talks and thinks of the pastimes of Krsna. 

Radharani forever offers Krsna a kind of intoxication by Her sweet talks. Sri radha supplies all the demands of Krsna, and Radharani possesses unique and uncommon qualities meant for Krsna’s satisfaction. 

Srimati Radhika is able to fulfill all the desires of Krsna. No one else can do so. 

Radha is so expert in all affairs that the damsels of Vraja come to learn the arts from her." (TLC Ch 31)

When Krsna wanted to experience loving emotions, affection and exchanges with a women, He knew such love could never happen with just "one", or Him alone, so Krsna divided Himself into two, Radha and Krsna, just so He could experience those loving exchanges.

However, Krsna is ALWAYS complete as Himself and therefore, NEVER alone, this is because Krsna is personally "two," manifesting as "two different bodies," Srimati Radharani and Krsna, and then expanding as unlimited Visnu-tattva personalities beginning with Balarāma.

Caitanya Caritamrta - "Just as the fountainhead, Lord Kṛṣṇa, is the cause of all incarnations, so Śrī Rādhā is the cause of all these consorts." (CC Adi 4.76, Translation)

When Radha and Krsna unite in "one" body, that is Lord Caitanya Mahaprabhu.

Krsna is always enjoying in Vrindavana with His consort Srimati Radharani, who Krsna created by dividing Himself into two, just so He could experience loving intimate exchanges with a women.

Krsna is never alone because He is "fully complete" as Himself due to always enjoying with His internal potency led by the personification of the internal energy, Srimati Radharani.

Krsna also expands Himself as His Visnu-tattva expansions, who are the unlimited Visnu/Narayana Forms of God who each have their own perpetual Vaikuntha planet that take up 3/4 of the Spiritual Sky.

Krsna also expands as Karanarnavasayi Visnu (Maha-Visnu), Garbhodakashayi Visnu and Ksirodakasayi Visnu (Paramatma) to maintain the material creation.

For material creation, Lord Krsna's plenary expansion assumes three Visnus as said above.

The first is Karanarnavasayi Visnu (Mahā-Viṣṇu) who creates the total material energy known as the mahat-tattva.

The second is Garbhodakaśāyī Viṣṇu who enters deep into all the massive Brahmanda universes and creates an inner secondary smaller material universe.

The third is Kṣīrodakaśāyī Visnu, who is the all-pervading super-soul accompanying each marginal living entity (jiva-soul) within each inner material universe existing deep inside each Brahmanda universal covering. Kṣīrodakaśāyī Visnu is in the heart of every marginal living entity (jiva-soul) and is known as Paramātmā.

He is present even within the atoms. The goal of life is to know Kṛṣṇa, who is situated within the heart of every living being as Paramātmā, the four-handed Viṣṇu form.

In Srimad Bhagavatam explains as follows-

"Kāraṇārṇavaśāyī Viṣṇu (Maha Visnu) is the first incarnation of the Supreme Lord, and He is the master of eternal time, space, cause and effects, mind, the elements, the material ego, the modes of nature, the senses, the universal form of the Lord.

Garbhodhakaśāyī Viṣṇu is an expansion of Mahā-Viṣṇu who expands from Nārāyaṇa/Visnu in Vaikuṇṭha.

Garbhodhakaśāyī Visnu is the form of Pradyumna within the material universe. He is the father of Brahmā who appeared from His navel.

Garbhodakashayi Visnu is also called Hiraņyagarbha.

Each Form has a different role in the maintenance of the temporary material universes, known as Brahmanda universes, billions of them that take up 1/4 of the Spiritual Sky.

Inside each massive Brahmanda universe exists a second universe with Garbhodakashayi Visnu, Lord Brahma, millions of demigods and the planetary systems exist (our universe has 14 planetary systems but is considered small compared to others)

There are also other expansions of Krsna who are NOT Visnu-tattva, like Siva-tattva (Lord Siva), and jiva-tattva, (jiva-souls who are the independent separate "marginal" living entities) 

The "marginal living entities" have their own free will and independence in Goloka Vrindavana that allows them to voluntarily choose for themselves how to serve Krsna, or even reject Him if they choose. 

Marginal potency also means the presence of "free will." 

There are many varieties of living entities in the Spiritual Sky and manifest in different categories of Krsna's energies but can NEVER be separated from Krsna.

They are Viṣṇu-tattva, Sakti-Visnu-tattva, Siva-tattva and the marginal living entities (jiva-tattva souls) 

Just like the Sun-disc can never be separated from the sun-rays similarly, Krsna is never without the various grades of living entities mentioned above.

Krsna is never alone due to everything being completely situated within Him.

Krsna is the Supreme Personality of Godhead and cause of all causes. 

The "cause of all causes" is significant here - meaning EVERYTHING is in Krsna.

Kṛṣṇa is simultaneously an independent Person from all the variety of different expansions.

This is Krsna's unlimited potential.

He is the Supreme controller, fully satisfied in Himself because everything is in Him and everything is part and parcel of Him. Therefore Krsna can NEVER be alone.

This should be properly understood so one can know why Krsna can never be alone.  

Krsna is the Supreme Lord as His own individual bodily (vigraha) Form, yet simultaneously all living entities depend on Krsna and His energies for their existence just like the sun-rays depend on the presence of Sun-disc to exist.

Srila Prabhupada - "It is said: vṛndāvanaṁ parityajya padam ekaṁ na gacchati.

In one sense, Kṛṣṇa, the original Personality of Godhead (īśvaraḥ paramaḥ kṛṣṇaḥ sac cid ānanda vigrahaḥ [Bs. 5.1]), does not even take one step away from Vṛndāvana. However, in order to take care of various duties, Kṛṣṇa had to leave Vṛndāvana.

He had to go to Mathurā to kill Kaṁsa, and then He was taken by His father to Dvārakā, where He was busy with state affairs and disturbances created by demons. 

Kṛṣṇa was away from Vṛndāvana, and He was not at all happy, as He plainly disclosed to Śrīmatī Rādhārāṇī. 

She is the dearmost life and soul of Śrī Kṛṣṇa, and He expressed His mind to Her as follows." (CC Madhya 13.149, Translation and Purport)

Srila Prabhupada - "Distinguishing between pure devotees and internal or confidential devotees, Śrī Rūpa Gosvāmī, in his book Upadeśāmṛta, traces the following gradual process of development.

Out of many thousands of karmīs, one is better when he is situated in perfect Vedic knowledge. Out of many such learned scholars and philosophers, one who is actually liberated from material bondage is better, and out of many such persons who are actually liberated, one who is a devotee of the Supreme Personality of Godhead is considered to be the best.

Among the many such transcendental lovers of the Supreme Personality of Godhead, Śrīmatī Rādhikā is very dear to Lord Kṛṣṇa, and similarly Her ponds, namely, Śyāma-kuṇḍa and Rādhā-kuṇḍa, are also very dear to the Supreme Personality of Godhead." (CC Adi 7.18-19, Purport).××.