I have got some affectionate dealings with my sons. But as soon as the son dies, or I die, the rasa is finished. But if you deal in the same way with Kṛṣṇa, who is the reservoir of all rasas, it will continue. If you love Kṛṣṇa as a friend in this life, if you develop your consciousness, Kṛṣṇa consciousness, as friend of Kṛṣṇa's, then tyaktvā dehaṁ punar janma naiti mām eti (BG 4.9), when you go to Kṛṣṇa, tyaktvā deham, giving up this body, then you go there as Kṛṣṇa's friend.
Just like Śrīla Śukadeva Gosvāmī's described in the Bhagavad-gītā, Śrīmad-Bhāgavatam: itthaṁ brahma-sukhānubhūtyā dāsyaṁ gatānāṁ para-daivatena, māyāśritānāṁ nara-dārakeṇa kṛta-puṇya-puñjāḥ (SB 10.12.11). The boys who were playing with Kṛṣṇa, Śukadeva Gosvāmī says that after many, many births accumulation of pious activities...