That Kṛṣṇa should be the object of love is the central point of Kṛṣṇa consciousness.
(Krsna Book).

We shall be able to understand very easily that Kṛṣṇa is the only object of love
(Srimad Bhagavatam---10:3:37-38---purport).

The object of love is Kṛṣṇa, and the container of that love is the devotee of Kṛṣṇa. Learned scholars call them ālambana—the foundations.
(Sri Caitanya Caritamrta---2:23:51---purport).

The inhabitants of Vṛndāvana, Vrajavāsīs, are living examples of devotional service. Theirs is ideal devotional service with attachment, and such devotion can be found only in Vrajabhūmi, Vṛndāvana. If one develops devotional service and attachment by following in the footsteps of the Vrajavāsīs, he attains rāga-mārga-bhakti, or devotional service in attachment to the Lord. According to Bhakti-rasāmṛta-sindhu (1.2.270), "Devotional service with ecstatic attachment for that service, which becomes natural for the devotee, is called rāga, or transcendental attachment." Devotional service discharged with such attachment is called rāgātmikā, and deep attachment with deep absorption in the object of love is called rāgātmikā. Examples of these can be seen in the activities of the residents of Vrajabhūmi. One who becomes attracted to Kṛṣṇa by hearing of such attachment is certainly very fortunate. When one becomes deeply affected by the devotion of the residents of Vrajabhūmi and tries to follow in their footsteps, he does not care for the restrictions or regulations of the revealed scriptures. This is the characteristic of one discharging rāga-bhakti.
(Teachings of Lord Caitanya).

The madhyama-adhikārī is a devotee who worships the Supreme Personality of Godhead as the highest object of love, makes friends with the Lord's devotees, is merciful to the ignorant and avoids those who are envious by nature.
(Nectar of instruction).

Lord Kṛṣṇa here confirms that the conditioned soul can reach the highest perfectional stage by surrendering to Him. One must give up all other responsibilities. This complete surrender unto the Supreme Personality of Godhead is the most auspicious path for the conditioned soul because the Supreme Lord is the supreme objective of love. Everyone is loving his self according to the advancement of his knowledge. Ultimately, when a person comes to understand that his self is the spirit soul and that the spirit soul is nothing but a part and parcel of the Supreme Lord, he recognizes the Supreme Lord as the ultimate goal of love and then surrenders unto Him. This surrender is considered auspicious for the conditioned soul. Our life, property, home, wife, children, house, country, society and all paraphernalia which are very dear to us are expansions of the Supreme Personality of Godhead. He is the centralobject of love because He gives us all bliss, expanding Himself in so many ways according to our different situations, namely bodily, mental or spiritual.
(Krsna Book).

Love is there, object of love is there, but it is misplaced.
(Lecture on Srimad Bhagavatam---1:2:6---26th. November, 1972).

Kṛṣṇa is the ultimate object of love.
(Lecture on Srimad Bhagavatam---1:15:50---27th. December, 1973).

That Kṛṣṇa, the Supreme Personality of Godhead, He is the supreme object of love, either by adoration or by serving or making friendship with Him, or loving Him as child, or loving Him as beloved—there are five different relationships: śānta, dāsya, sākhya, vātsalya, mādhurya—that is real love.
(Philosophy discussion ).