There must be some difference between the enemies and the friends. If Kṛṣṇa's enemies could get freed from material contamination and become one with the Supreme, then certainly His dear friends like the gopīs can achieve such freedom and much more.
Besides that, in the Bhagavad-gītā Kṛṣṇa is called Hṛṣīkeśa. Śukadeva Gosvāmī also said that Kṛṣṇa is Hṛṣīkeśa, the Supersoul. Whereas an ordinary man is a conditioned soul covered by the material body, Kṛṣṇa and Kṛṣṇa's body are the same because He is Hṛṣīkeśa. Any person making a distinction between Kṛṣṇa and Kṛṣṇa's body is fool number one. Kṛṣṇa is Hṛṣīkeśa and Adhokṣaja. These two particular words have been used by Śukadeva Gosvāmī in this instance. Hṛṣīkeśa is the Supersoul, and Adhokṣaja is the Supreme Personality of Godhead, transcendental to the material nature.
(Krsna Book).

You, my Lord, are infallible. You are the Supreme, the purest of all living entities. You live in everyone's heart. You are the shelter of all living entities, Nārāyaṇa. Being seated in the heart of all living beings, You are the supreme director of everyone's sensual activities; therefore, You are called Hṛṣīkeśa.
“My dear Supreme Lord Kṛṣṇa, because You have given me this body of a demigod, I will have to go to some heavenly planet; so I am taking this opportunity to beg for Your mercy. I pray that I may have the benediction of never forgetting Your lotus feet, no matter to which form of life or planet I may be transferred. You are all-pervading, present everywhere as cause and effect. You are the cause of all causes, and Your power is unlimited. You are the Absolute Truth, the Supreme Personality of Godhead and the Supreme Brahman. I therefore offer my respectful obeisances unto You again and again.
(Krsna Book).

The master of the senses is Hṛṣīkeśa, Lord Kṛṣṇa. Therefore, the senses should always be engaged in His service. As for material reputation, there were many demons like Rāvaṇa who wanted to go against the laws of material nature, but they all failed. One should therefore not take to the demoniac activity of claiming to be a Vaiṣṇava just for false prestige, without performing service to the Lord. But when one engages oneself in the devotional service of the Lord, automatically the Vaiṣṇava reputation comes to him. There is no need to be envious of the devotees who are engaged in preaching the glories of the Lord.
(Krsna Book).

In this way everyone will become spiritually inclined, and the entire society will be converted to Kṛṣṇa consciousness. The desire to satisfy the material senses will automatically diminish, and the senses will become so purified that they will be able to engage in bhakti (devotional service to the Lord). Hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate (CC.2:19:170). By serving the Lord, one's senses are gradually purified. The engagement of one's purified senses in the service of Lord Hṛṣīkeśa is called bhakti. When the dormant propensity for bhakti is awakened, one can understand the Supreme Personality of Godhead as He is. Bhaktyā mām abhijānāti yāvān yaś cāsmi tattvataḥ. (B.G.18:55) This is the process of giving humanity the chance to awaken Kṛṣṇa consciousness. Thus people can perfect their lives in all respects.
(Sri Caitanya Caritamrta------2:4:102------purport).

Lord Kṛṣṇa is referred to as Hṛṣīkeśa in this verse because He is the owner of all senses. The living entities are part and parcel of Him, and therefore the senses of the living entities are also part and parcel of His senses. The impersonalists cannot account for the senses of the living entities, and therefore they are always anxious to describe all living entities as senseless, or impersonal. The Lord, situated in the hearts of all living entities, directs their senses. But He directs in terms of the surrender of the living entity, and in the case of a pure devotee He directly controls the senses. Here on the Battlefield of Kurukṣetra the Lord directly controls the transcendental senses of Arjuna, and thus His particular name of Hṛṣīkeśa. The Lord has different names according to His different activities.
(Bhagavad-Gita------1:15------purport).

In this verse Arjuna is referred to as Guḍākeśa. Guḍākā means sleep, and one who conquers sleep is called guḍākeśa. Sleep also means ignorance. So Arjuna conquered both sleep and ignorance because of his friendship with Kṛṣṇa. As a great devotee of Kṛṣṇa, he could not forget Kṛṣṇa even for a moment, because that is the nature of a devotee. Either in waking or in sleep, a devotee of the Lord can never be free from thinking of Kṛṣṇa's name, form, qualities and pastimes. Thus a devotee of Kṛṣṇa can conquer both sleep and ignorance simply by thinking of Kṛṣṇa constantly. This is called Kṛṣṇa consciousness, or samādhi. As Hṛṣīkeśa, or the director of the senses and mind of every living entity, Kṛṣṇa could understand Arjuna's purpose in placing the chariot in the midst of the armies.
(Bhagavad-Gita------1:24------purport).

The talk was going on between intimate friends, namely the Hṛṣīkeśa and the Guḍākeśa. As friends, both of them were on the same level, but one of them voluntarily became a student of the other. Kṛṣṇa was smiling because a friend had chosen to become a disciple. As Lord of all, He is always in the superior position as the master of everyone, and yet the Lord agrees to be a friend, a son, or a lover for a devotee who wants Him in such a role. But when He was accepted as the master, He at once assumed the role and talked with the disciple like the master—with gravity, as it is required. It appears that the talk between the master and the disciple was openly exchanged in the presence of both armies so that all were benefited. So the talks of Bhagavad-gītā are not for any particular person, society, or community, but they are for all, and friends or enemies are equally entitled to hear them.
(Bhagavad-Gita------1:24------purport).

The body consists of the senses. The Supreme Lord is Hṛṣīkeśa, Which means "the controller of the senses." He is the original controller of the senses, just as the king is the original controller of all the activities of the state; the citizens are secondary controllers. The Lord says, "I am also the knower." This means that He is the superknower; the individual soul knows only his particular body.
(Bhagavad-Gita------13:3------purport).

By such engagement, human energy is spoiled, because human energy is primarily meant for purifying the senses in order to engage them in satisfying the senses of the Supreme Lord. The Supreme Lord, being the supreme possessor of spiritual senses, is the master of the senses, Hṛṣīkeśa. Hṛṣīka means the senses, and īśa means the master. The Lord is not the servant of the senses, or, in other words, He is not directed by the dictation of the senses, but the conditioned souls or the individual living entities are servants of the senses. They are conducted by the direction or dictation of the senses, and therefore material civilization is a kind of engagement in sense gratification only. The standard of human civilization should be to cure the disease of sense gratification, and one can do this simply by becoming an agent for satisfying the spiritual senses of the Lord.
(Srimad Bhagavatam------2:5:30------purport).

The senses, led by the mind, act under the influence of the demigods. When the service is ultimately aimed at the Supreme Personality of Godhead, the senses are in their natural position. The Lord is called Hṛṣīkeśa, for He is actually the proprietor and ultimate master of the senses. The senses and the mind are naturally inclined to work, but when they are materially contaminated they work for some material benefit or for the service of the demigods, although actually they are meant to serve the Supreme Personality of Godhead. The senses are called hṛṣīka, and the Supreme Personality of Godhead is called Hṛṣīkeśa. Indirectly, all the senses are naturally inclined to serve the Supreme Lord. That is called bhakti.
(Srimad Bhagavatam------3:25:32------purport).

Although the individual soul possesses the indriyas, or senses, he is not actually the proprietor, for the proprietor is the Supersoul. Consequently the Supersoul is called Hṛṣīkeśa, and the individual soul is advised by the direction of the Supersoul to surrender to Him and thus be happy (sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja). Thus he can become immortal and be transferred to the spiritual kingdom, where he will achieve the highest success of an eternal, blissful life of knowledge. In conclusion, the individual soul is different from the body, senses, living force and the airs within the body, and above him is the Supersoul, who gives the individual soul all facilities. The individual soul who renders everything to the Supersoul lives very happily within the body.
(Srimad Bhagavatam------7:2:45------purport).

One must be freed from all designations. When one identifies himself with the material world, his senses are impure. But when one achieves spiritual realization and identifies himself as a servant of the Lord, his senses are purified immediately. Engagement of the purified senses in the service of the Lord is called bhakti. Hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate. One may enjoy the senses for many thousands of years, but unless one purifies the senses, one cannot be happy.
(Srimad Bhagavatam------9:18:51------purport).